If a Study Finds That the Heritability of Aggression Is

Multiple Choice

If a study finds that the heritability of aggression is 40 percent, it means that

A) 40 percent of the population will behave very aggressively.
B) a person who commits a crime has a 40 percent chance of having aggressive parents.
C) only one of a set of identical twins born to aggressive parents will inherit aggression.
D) 40 percent of the variability in aggression in the population is due to variations in the genes in that population.