Young Children Often Have Difficulty Waiting for a Reward Such

Young children often have difficulty waiting for a reward such as a marshmallow because

A) they are neurologically more oriented to sweeter foods because of their resemblance to mothers' milk.
B) children's impulsive "hot" system in the brain tends to override the more rational "cool" system in the brain.
C) although the inhibitory system of the pre-frontal cortex has developed, children do not yet call on strategies of inhibition.
D) parents tend to not be too strict in controlling young children's eating behaviors compared to controlling older children.
E) young children lack the ability to understand the rules associated with delay-of-gratification tasks.