In Metzgar's Experiments on Learning in White-Footed Mice

In Metzgar's experiments on learning in white-footed mice,

A) the mice familiar with their surroundings were more likely to be caught by the owl.
B) the mice familiar with their surroundings were less likely to be caught by the owl.
C) learning took place during a narrow window of time early in postnatal life.
D) behavioral imprinting was shown to be the dominant mechanism.
E) the evidence strongly supported biological determinism.