According to Your Textbook, Which of the Following Is True

According to your textbook, which of the following is true?

A) The volume of gray matter in the brain is correlated with intelligence.
B) The IQ of adopted children correlates less with their biological parents than with their adoptive parents.
C) Dizygotic twins raised apart are more similar to each other in IQ than monozygotic twins raised together.
D) The IQ of dizygotic twins is more correlated than that of monozygotic twins.