To use Sales Cloud data in their queries, the admin should use Synchronized Data Sources. This feature allows Marketing Cloud to automatically import and update data from Sales Cloud objects and fields. The data is stored in data extensions that can be queried using SQL.

Explanation
The security setting 'Enable Username and Password for Web Services' allows users to access the API with their Marketing Cloud username and password. If this setting is deselected, users will need to use an API user or an installed package to access the API

Recommendations for integrating diverse student data into Journey Builder:
Data Designer: Utilize Data Designer to establish relationships between student data, alumni records, and the contact record. This tool allows the creation of a unified view that supports personalized journeys based on comprehensive student profiles.
Synchronized Data Sources: Implement synchronized data sources to continuously import and update data from the Sales Cloud, ensuring that the data in Marketing Cloud remains current and accurate.
Reference: Salesforce Marketing Cloud Data Management

Explanation
IP ramp-up takes four to six weeks to be able to fully send to all 3 million customers and IP ramp-up is important to establish a positive sender reputation. These responses articulate proper IP warming, which is the process of gradually increasing email volume from a new or unused IP address to build trust and credibility with Internet Service Providers (ISPs)