Which Best Describes Brain Development from Birth Through Adolescence

Which best describes brain development from birth through adolescence?

A) Synapses are pruned in early childhood as a response to the environment but grow back in adolescence as the child matures.
B) Synapses that are unused are pruned while myelination of the axon increases the efficiency of communication between childhood and adolescence.
C) Dendrite and axon communication becomes less efficient as the child moves into adolescence.
D) Axons and dendrites expand in the number of connections they make during the adolescent years.
E) Axons and dendrites become thinner and more sparse throughout childhood and adolescence.