Ian Was Predisposed to Being Very Aggressive with His Peers

Multiple Choice

Ian was predisposed to being very aggressive with his peers in school, who responded by rejecting him. Later in life, Ian began to associate with other aggressive youth and to participate in a variety of delinquent behaviors. This is an example of ________

A) phenotypic vulnerability to aggression.
B) a phenotypic diathesis.
C) polygenic expression.
D) the way the genotype may shape the phenotype.