Which of the Following Is Most Accurate About Infant Emotion

Which of the following is most accurate about infant emotion in the first 2 years of life?

A) Emotions are tied to internal states of pain and pleasure during the first 2 years of life.
B) Emotions change in stage-like progression from internal physical expressions to differentiation of self in relation to others in the environment.
C) Infant emotional expressions remain limited and unchanging during the first 2 years with no stage-like progression.
D) Infant emotions are primarily negative in the first 2 years, reflecting wariness, anger, and defiance.