Which Statement About the Process of Myelination Is True

Which statement about the process of myelination is true?

A) Myelination occurs in a similar pattern in humans and chimpanzees.
B) Cortical areas become myelinated at approximately the same rates.
C) Myelination begins at the cortex and moves down into the brain stem.
D) Myelination begins in the brain before birth and continues into early adulthood.