Early philosophers suggested that human personality is based on:

A) the sense of being able to achieve goals.
B) early relationships with the mother.
C) the mixes of four basic body fluids.
D) a person's subjective sense of self and free will.

Early philosophers, particularly those from the Humorism school of thought such as Hippocrates and later Galen, proposed that human personality and temperaments were based on the balance of four bodily fluids or humors: blood, phlegm, black bile, and yellow bile. This theory, known as the four humors theory, was influential in shaping early ideas about personality.