Where do the roots of the modern trait approach to personality begin?

A) Henry Murray's approach to understanding motivation
B) Carl Jung's psychodynamic view of the self
C) James Cattell's early work on mental testing
D) Hippocrates's and Galen's idea of "humors"

The roots of the modern trait approach to personality can be traced back to Hippocrates and Galen's idea of "humors," which proposed that personality and behavior were influenced by four bodily fluids or humors: blood, yellow bile, black bile, and phlegm. This concept later influenced the development of trait theories of personality, which focus on identifying and measuring specific characteristics or traits that contribute to individual differences in behavior and personality.