Reference: https://www.acams.org/en/resources/aml-glossary-of-terms

Spear phishing is a targeted form of phishing scam in which cybercriminals send highly convincing emails to specific individuals within an organization. The emails often contain personal information or details that make them seem legitimate and trustworthy. The goal of spear phishing is to trick the recipients into clicking a malicious link or downloading an infected attachment, or to reveal confidential information or money to the attackers. In this case, the customers of the telecommunications firm received an email that pretended to be from the company, but was actually a fake. The email directed them to a spoofed website that asked for their personal information, which could be used for identity theft or fraud. This is a clear example of a spear phishing attack.
References:
What is Spear Phishing? Definition and Prevention | Fortinet
What is spear phishing? Examples, tactics, and techniques | CSO Online
Spear phishing - OxfordDictionaries

Explanation/Reference: https://aml-cft.net/library/banks-amlcft-red-flags/

According to the ACAMS CAMS Study Guide, 6th Edition, Chapter 3, Section 3.2, the financial institution should implement the following measures in order to identify and investigate money laundering activity from their clients:
Adverse news screening: This is a process of checking the clients' names and related parties against various sources of negative or adverse information, such as media reports, sanctions lists, watch lists, law enforcement databases, etc. Adverse news screening can help the financial institution to detect any potential red flags or indicators of money laundering or other criminal activities involving their clients, and to take appropriate actions, such as conducting enhanced due diligence, filing suspicious activity reports, or terminating the relationship.
Transaction monitoring: This is a process of reviewing and analyzing the clients' transactions and activities, such as deposits, withdrawals, transfers, payments, etc., to identify any unusual or suspicious patterns or behaviors that deviate from their normal or expected profile. Transaction monitoring can help the financial institution to detect any possible signs of money laundering or other financial crimes, such as structuring, layering, integration, fraud, tax evasion, etc., and to investigate and report them accordingly.
The other options are not measures that the financial institution should implement in order to identify and investigate money laundering activity from their clients, although they may be part of the overall AML program or compliance culture:
Integrity policy: This is a document that outlines the ethical principles and values that guide the conduct and behavior of the financial institution and its employees. An integrity policy can help the financial institution to promote a culture of honesty, transparency, and accountability, and to prevent or deter any misconduct or corruption. However, an integrity policy alone is not sufficient or specific enough to identify and investigate money laundering activity from their clients.
Whistleblower hotline: This is a mechanism that allows the employees or other stakeholders of the financial institution to report any suspected or observed violations of the AML policies, procedures, or regulations, or any other wrongdoing or malpractice, without fear of retaliation or reprisal. A whistleblower hotline can help the financial institution to encourage and facilitate the reporting of any potential or actual money laundering activity from their clients or within the organization, and to protect the rights and interests of the whistleblowers. However, a whistleblower hotline is not a measure that the financial institution implements to identify and investigate money laundering activity from their clients, but rather a tool that supports the AML program and compliance function.
Code of conduct: This is a document that defines the standards and expectations of the financial institution and its employees regarding their professional and ethical behavior, responsibilities, and obligations. A code of conduct can help the financial institution to establish and maintain a culture of compliance and integrity, and to prevent or address any conflicts of interest, misconduct, or abuse of power. However, a code of conduct is not a measure that the financial institution implements to identify and investigate money laundering activity from their clients, but rather a framework that governs the AML program and compliance function.
References:
ACAMS CAMS Study Guide, 6th Edition, Chapter 3, Section 3.2
ACAMS CAMS Certification Video Training Course - Exam-Labs
Exam CAMS: Certified Anti-Money Laundering Specialist (the 6th edition)

According to the Anti-Money Laundering Specialist (the 6th edition) study guide, an AML training program should include the requirement that new staff receive training during employee orientation or shortly thereafter on bank procedures. This is because new staff need to be aware of the bank's policies and procedures for complying with the money laundering regulations, such as customer due diligence, transaction monitoring, record-keeping, and reporting of suspicious activities. Training new staff as soon as possible also helps to reduce the risk of human errors or oversights that could facilitate money laundering or terrorist financing.
References:
1: ACAMS, CAMS Certification Package - 6th Edition, Chapter 5, page 143
2: ACAMS, CAMS Certification Package - 6th Edition, Chapter 5, page 144
3: Technical factsheet Anti-money laundering (AML) training: frequently asked questions, page 1