Credibility of a source is primarily evaluated in which part of the CRAAP test?

Answer:
Accuracy.
Explanation:
The CRAAP Test is a test to check the reliability of sources. The test was created by Sarah Blakeslee et. al. CRAAP is an acronym which stands for Currency, relevance, authority, accuracy, and purpose.
The part that evaluates credibility of a source is accuracy. Accuracy helps to identify the reliability and credibility of a content. Questions related to the source from where information is passed down, whether information is evident based or not, etc helps to check the truthfulness of the source.
Therefore, the correct answer is accuracy.