Comprehensive and Detailed In-Depth Explanation:

Checklist-based testing uses specific test conditions (B) that help testers ensure key aspects are validated. The checklist items can be derived from past defects, requirements, or regulatory standards.

(A) is incorrect because general guidelines lack specificity.

(C) is incorrect because checklists can be used for both manual and automated testing.

(D) is incorrect because checklists are useful for both functional and non-functional testing (e.g., security, performance).

Checklists help ensure completeness without enforcing strictly scripted execution.