Which of the Studies Below Provide Evidence Linking Genes and Behavior

Which of the studies below provide evidence linking genes and behavior? (Check all that apply.)

A) Fruit flies who are mutant for the genes dunce or rutabaga have impaired learning.
B) Mice that are lacking either the ephrinB3 or the EphA4 gene cannot walk normally, but instead hop like a kangaroo.
C) Two lines of fruit flies were created by repeatedly selecting for high or low aggressive behavior. After multiple generations, the high line was reliably more aggressive than the low line.
D) Twin studies comparing monozygotic and dizygotic twins have found a high heritability for height, although environmental influences like nutrition also play a role.