Why Do Scientists Believe That the Process of Synaptic Pruning

Why do scientists believe that the process of synaptic pruning occurs?

A) In order for the brain cells to fit within the skull cavity, some neurons must be sacrificed.
B) This process aids the brain in handling the explosive growth of information to which children are exposed.
C) The only way for the brain to stay young is to discard some of the older neurons that have developed over time.
D) As a child is exposed to stimuli, he or she becomes overwhelmed and the brain compensates by reducing the total number of brain connections.