Research Shows That the "Big 5" (Five-Factor Model)may Be a Biological

Research shows that the "Big 5" (five-factor model) may be a biological universal for all but which of the following reasons?

A) There may be an evolutionary advantage to people who are more open, conscientiousness, extraverted, agreeable, and less neurotic.
B) Chimpanzee personalities closely resemble the traits of the five-factor model.
C) Cross-cultural studies support the five-factor model.
D) Psychotherapists find that certain traits are more predictive of improvement in counseling across clients of different cultural backgrounds.