What is a ""subject role"" that might be adopted by participants responding to the demand characteristics of a research study?

Answer: b. apprehensive subject role.

Explanation:

The Apprehensive Subject Role refers to a situation where the subject / participant feels uncomfortable about being researched.

Because of this, they might react in a way that they consider to be socially acceptable so that they don't look bad which means that they may give a response that they don't think to be true because they want to be accepted.

This is one of the roles a participant may assume.