Which of the Following Is True of Brain Structures in Adolescents

Which of the following is true of brain structures in adolescents?

A) The pruning of unused dendritic connections during childhood results in a reduction in density of gray matter, thus decreasing the brain's efficiency.
B) The fully developed frontal cortical systems associated with motivation, impulsivity, and addiction may help explain why adolescents tend to seek thrills and novelty.
C) By mid- to late adolescence, young people have fewer but stronger, smoother, and more effective neuronal connections, making cognitive processing more efficient.
D) Adolescents process information similarly as adults do.