In Terms of Brain Development in School-Age Children, Synaptic Pruning

In terms of brain development in school-age children, synaptic pruning is part of the shift in activation from:

A) smaller focal areas to larger diffuse areas.
B) larger diffuse areas to smaller focal areas.
C) the prefrontal cortex to the brain stem.
D) more diffusion to less focal activation in the prefrontal cortex.