Two People Experience a Violent Earthquake

Multiple Choice

Two people experience a violent earthquake. One person is mildly fazed by this event and copes well with it. The other person, who has a biological predisposition to anxiety, becomes very stressed after the event, has difficulty coping with it, and eventually gets ill. Because the effect of the earthquake differed, depending on whether the person had the predisposition of anxiety or not, this would be an example of

A) introspection
B) an interaction
C) insight
D) the biological level of analysis