Comprehensive and Detailed Explanation From Exact AWS AI documents:

Providing references or citations increases trust and transparency by:

Allowing users to verify information

Demonstrating responses are grounded in authoritative sources

Reducing perceived hallucination risk

AWS Responsible AI guidance emphasizes source attribution as a best practice to increase user trust in AI-generated content.

Why the other options are incorrect:

Confidence labels (A) do not verify correctness.

Avatars (C) are cosmetic.

Language style (D) affects tone, not trustworthiness.

AWS AI document references:

Building Trustworthy AI Systems

Grounding AI Responses in Source Documents

Responsible AI Transparency Practices