To Say That the Heritability of a Trait Is Approximately

To say that the heritability of a trait is approximately 50 percent means

A) that genes are responsible for 50 percent of the trait in an individual,and the environment is responsible for the rest.
B) that the trait's appearance in a person will reflect approximately equal genetic contributions from both parents.
C) that of the variation in the trait within a group of people,50 percent can be attributed to heredity.
D) all of these things.