Which of the following statements is true?

a. There is no evidence for a common genetic basis to the "Big Five" personality traits.
b. There is evidence for a common genetic basis to the "Big Five" personality traits only
among certain racial groups of humans.
c. There is evidence for a common genetic basis to the "Big Five" personality traits across
cultures in humans but not in other animal species.
d. There is evidence for a common genetic basis to the "Big Five" personality traits that
cuts across all human cultures and many other species of animals.

D