Thought to be an asymmetry in brain development, __________ is the most widely known and studied learning disorder.

Aaron was recently assigned to a college dorm room with Bo. Considering that Bo is in a popular fraternity, he was surprised to learn that Bo was actually relatively calm and subdued most of the time. According to social-cognitive theorists, which of the following best explains the differences Aaron observed in Bo's behavior?

a. The group environment exerted a strong influence on his personality.
b. He had an internal locus of control but now appears to have an external locus of control.
c. His individual personality was a stronger influence than the group environment.
d. His behavior is now under his control and is no longer being reciprocally determined.

Regarding prenatal development, there is no structural difference between males and females in the first

a. trimester b. six weeks c. 12 weeks d. four months