Brain research on intelligence differences suggests that, by comparison to people with lower IQs, people with higher IQs a. acquire greater cortical thickness across adolescence. b. always have...

Brain research on intelligence differences suggests that, by comparison to people with lower IQs, people with higher IQs

a. acquire greater cortical thickness across adolescence.

b. always have greater cortical thickness.

c. never have greater cortical thickness.

d. have greater cortical thickness as young children.