Answer:
A. content
Step-by-step explanation:
Content validity: In psychological research, the term "content validity" is described as the degree to which the different items on a particular test or study are considered as "fairly representative" of an entire domain that particular test or study seeks to analyze or measure. However, content validity tends to measure knowledge of a specific content domain for which it has been designed to analyze knowledge.
In the question above, Michael is questioning the content validity of the test.