After Learning About Personality in School,Becky Comes Home and Tells

After learning about personality in school,Becky comes home and tells her sister,Darlene,that she is introverted because her brain is relatively insensitive to rewards but highly sensitive to punishment.Darlene does not seem impressed by her sister's knowledge of ____ theory of personality.

A) the five-factor
B) the object relations
C) Eysenck's biological trait
D) Gray's reinforcement sensitivity