What Evidence Do Some Psychologists Cite to Support the Idea

What evidence do some psychologists cite to support the idea that humans have a few "basic" emotions such as joy, sadness, anger, fear, surprise, and disgust?

A) Each of these experiences depends on the activity of a different neurotransmitter in the brain.
B) People with various genetic abnormalities experience all of the emotions except one, and different mutations delete different emotions.
C) Each emotion develops rather suddenly at a different age in human development.
D) People throughout the world can recognize facial expressions corresponding to those experiences.