Comprehensive and Detailed In-Depth Explanation:

Policies and guidelines are considered documentary evidence because they are written records that demonstrate how an organization complies with ISO 9001 requirements.

Clause References:

ISO 19011:2018, Clause 6.4.6 – Audit Evidence:

Documentary evidence includes manuals, procedures, and policies.

Why is the Correct Answer C?

Documentary evidence includes written records such as policies, procedures, and documented instructions that support QMS implementation.

Auditors review policies to verify conformance with ISO 9001.

Why are the Other Options Incorrect?

A (Confirmative evidence) → Not a recognized category in ISO auditing.

B (Technical evidence) → Technical evidence refers to measurements, test results, or product data, not policies.