Psychologists Attempting to Identify Basic Emotions Have Generally Made Each

Psychologists attempting to identify basic emotions have generally made each of the following assumptions, EXCEPT

A) basic emotions should appear early in life, without requiring much experience.
B) basic emotions should each have a distinct facial expression and characteristic physiology.
C) basic emotions should be about the same for people in different cultures.
D) basic emotions should be triggered by the same situations or stimuli for all people.