Both Kenneth Ross's research on social behavior in fire ants (1997) and Isadora Bielsky's research on the function of the AVPRiA receptor in mice……

A) Examined the effect of different alleles on social behavior
B) Examined the effect of a single gene on behavior
C) Examined several genes associated with each behavior
D) Determined the heritability of the trait
E) Determined there is significant gene-environment interactions