Different groups of vervet monkeys learned to prefer either blue or pink corn.All but one of their 27 infant monkeys subsequently came to prefer the same color corn preferred by the adult monkeys in their group.This subsequent outcome best illustrated

A) operant conditioning.
B) instinctive drift.
C) observational learning.
D) latent learning.

The fact that the infant monkeys learned to prefer the same color corn as the adult monkeys in their group suggests that they learned through observational learning, where they observed and mimicked the behavior of their group. This is supported by research on social learning in primates, suggesting that monkeys are capable of observational learning and may learn through watching their peers. Operant conditioning, instinctive drift, and latent learning are not supported by the evidence provided in the scenario.