In Their Visual Cliff Research, Gibson and Walk Studied Both

In their visual cliff research, Gibson and Walk studied both children and goats. Why goats?

A) goat and human visual systems are identical
B) goats could be placed on the visual cliff while blindfolded; you cannot do that to children
C) unlike children, goats can be raised is perceptual isolation
D) goats can move through the environment at about the same time as humans