The two red flags indicating potential engagement of a bank employee in money laundering are A.
Lavish lifestyle that cannot be supported by an employee's salary, and E. Maintaining friendships with customers and going to restaurants, games, and other events. A bank employee who has a lifestyle that cannot be supported by their salary could be receiving money from illicit activities. Similarly, if the employee is maintaining friendships and going to social events with customers, they could be receiving money in exchange for providing special services. These behaviors should be monitored closely to ensure that the employee is not engaging in activities that could be linked to money laundering.

Reference: http://www.fatfgafi.org/media/fatf/documents/recommendations/pdfs/FATF%20Recommendations%20
(approved%20February%202012)%20reprint%20May%202012%20web%20version.pdf (page 19, DNFBPs: customer due diligence, bulleted point (b))

According to the Certified Anti-Money Laundering Specialist (the 6th edition), Section 2.2.5 Suspicious Activity Reporting (SAR) Requirements, a Suspicious Activity Report (SAR) filing is required when a financial institution is aware of, or suspects, a possible violation of law or regulation, or any other suspicious activity related to money laundering, terrorist financing, or other unlawful activity. In this case, Answer A would require a Suspicious Activity Report filing as the deposits are made on a daily basis without providing a legitimate purpose.
According to the Financial Crimes Enforcement Network's (FinCEN) guidance, one example of a suspicious transaction is "frequent deposits of cash or monetary instruments in amounts under $10,000 to the same account, or a pattern of such deposits, unless the financial institution has a reasonable explanation for the pattern." (CAMS Manual, 6th Edition, Page 209)