When Researchers Examine Whether the Five Basic Factors of Personality

When researchers examine whether the five basic factors of personality are genetically influenced, they have found:

A) no evidence for a genetic influence.
B) self-report evidence suggests that they are but observer reports are inconclusive.
C) self-report and observer reports both suggest that they are, but research has not been done cross-culturally.
D) self-report, observer report, and cross-cultural research all suggest that they are.