In Order to Determine Whether Childhood Behavior Can Predict Adult

In order to determine whether childhood behavior can predict adult sexual orientation, the best experimental design would be to

A) select a large sample of children, and assess gender-related behaviors and sexual preferences at different times in childhood, adolescence, and adulthood.
B) interview gay adults about their behavior as children.
C) interview both gay and straight adults about their behavior as children and compare the two.
D) identify transgendered children and determine what percentage of individuals seek sex reassignment surgery.
E) identify children who are teased or bullied in school for being "gay" or "queer" and monitor their behavior and sexual preferences over time.