https://learn.microsoft.com/en-us/purview/sensitivity-labels-office-apps#office-file-types-supported

Explanation:
Box 1: Yes
User1 is in the Contoso subscription, and has the email address [email protected] Sensitivity label Sensitiviy1 has assigned contoso.com users Co-owner permissions.
For File1 has Sensitiviy1 been automaticallyapplied by using an auto-labeling policy.
Box 2: Yes
User2 is in the Contoso subscription, and has the email address [email protected] Sensitivity label Sensitiviy1 has assigned contoso.com users Co-owner permissions.
For File3 has Sensitiviy1 been applied by User1.
Box 3: No
User3 is in the Fabrikam subscription, and has the email address [email protected] Sensitivity label Sensitiviy1 has assigned fabrikam.com users reviewer permissions.
For File2 has Sensitiviy1 been applied by User2.
Reference:
https://learn.microsoft.com/en-us/purview/encryption-sensitivity-labels

In Microsoft 365, the minimum required role to create custom trainable classifiers is Compliance Administrator. While Global Administrator and Security Administrator roles may also have the necessary permissions, the Compliance Administrator role is the most directly aligned with this specific task.
Reference:
https://learn.microsoft.com/en-us/purview/trainable-classifiers-get-started-with

Correct:
* You create a data loss prevention (DLP) policy that has only the Exchange email location selected.
To ensure Azure Storage Account keys are encrypted when sent via email, you need a Data Loss Prevention (DLP) policy that detects Azure Storage Account keys using a sensitive information type and automatically encrypts emails containing these keys.
A DLP policy with Exchange email as the only location meets this requirement because it identifies sensitive data in email messages and it applies protection actions, such as encryption, blocking, or alerts.
* You create a data loss prevention (DLP) policy that has Exchange email, SharePoint sites, OneDrive accounts, and Teams chat and channel messages selected.OneDrive accounts, and Teams chat and channel messages selected.
Creating a Data Loss Prevention (DLP) policy that includes Exchange email as a location can help detect and prevent the sharing of sensitive information, like Azure Storage keys, in plain text.
By setting up a DLP policy with conditions to identify Azure Storage keys and enforce encryption or blocking actions for Exchange email, the policy will ensure that any emails containing such sensitive information are either encrypted or prevented from being sent.
Incorrect:
* You configure a mail flow rule that matches a sensitive info type.
* You configure a mail flow rule that matches the text patterns.
To ensure Azure Storage Account keys are encrypted when sent via email, you need a Data Loss Prevention (DLP) policy that detects Azure Storage Account keys using a sensitive information type and automatically encrypts emails containing these keys.
Text patterns in mail flow rules are not as reliable as sensitive information types in DLP.
Mail flow rules lack advanced content detection and machine learning-based classification, making them less effective than DLP.
* You create a data loss prevention (DLP) policy that has all locations selected.
Reference:
https://docs.microsoft.com/en-us/exchange/policy-and-compliance/mail-flow-rules/conditions-and- exceptions

Required for monitoring interactions with third-party generative AI sites:
[B] * Devices are onboarded to Microsoft Purview, required for:
- Gaining visibility into sensitive information that's shared with third-party generative AI sites. For example, a user pastes credit card numbers into ChatGPT.
[A]- Applying endpoint DLP policies to warn or block users from sharing sensitive information with third-party generative AI sites. For example, a user identified as elevated risk in Adaptive Protection is blocked with the option to override when they paste credit card numbers into ChatGPT.
Reference:
https://learn.microsoft.com/en-us/purview/dspm-for-ai-considerations