Answer:
D. reaction formation
Step-by-step explanation:
Reactive formation is a defense mechanism. It occurs when someone experiences an instinctive or unconscious desire that they consciously reject. This leads him to develop an opposite impulse to what he rejects. This explains Simon's behavior. Simon greeted Jeffrey and shook his hand, even feeling uncomfortable with Jeffrey's presence, because his body was expressing the defense mechanism called reactive formation.
An example can help us understand better. Suppose a woman doesn't agree with her mother's way of being, which is very controlling. This rejection makes her feel hatred for the way her mother tries to intervene and limit her life. She doesn't want to feel this hatred: deep down she believes she's a bad person for nurturing this feeling against her mother. Then she develops a reactive training behavior: she puts her life aside to care for and please her mother.