In the context of brain growth and emotional development, which of the following is characteristic of the second major shift in brain organization?
A. Differentiation of basic emotions begins as the cerebral cortex becomes functional.
B. Myelination of the frontal lobes results in physical mobility and exploratory behavior.
C. The parasympathetic system, which is involved in excretion and sexual excitation, matures.
D. Limbic structures such as the hippocampus grow and become more adultlike.
Answer: D
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