C. The Einstein Trust Layer automatically masks sensitive data before it is sent to the LLM.

Reason other not correct:
A. Enable data encryption Encryption at rest does not validate prompt masking; it protects stored data only
B. Review platform event logs Logs do not show how the prompt was masked before LLM processing

The correct answer is:

✅ C. Inspect the AI audit trail

Explanation

The Einstein Trust Layer provides transparency and governance over how data is processed inside AI prompts.
To confirm that address information is being masked before being sent to the model, the Agentforce Specialist should:

👉 Use the AI Audit Trail, which shows:

The grounded prompt sent to the LLM

What data was masked or redacted

What grounding sources were used

Exactly what the LLM received

This is the official method for validating privacy protections and data masking.

Agree C is the correct answer