Which of the following reasons for doing research implies researching with a view to being able to manipulate human behavior?

When I find myself doing something irrational "just because I want to," I am succumbing to this function of emotions

a. learning b. problem-solving c. persuasion and influence d. fulfilling interpersonal needs

Imagine you are serving on a jury. The defendant in the case answers all of the prosecutor’s questions but slouches in his chair, avoids eye contact, and mumbles during examination. Analyze the effects that his nonverbal behavior could have on your perceptions of innocence or guilt.

What will be an ideal response?