FGA Is One of the STRs That Are Used to Compare

Multiple Choice

FGA is one of the STRs that are used to compare DNA between different people. Why is FGA useful for comparing DNA between different people?

A) FGA varies in the number of repeats between different people.
B) FGA varies in sequence between different people.
C) FGA is only present in some people's genomes.
D) FGA is present in different places in different people's genomes.