Harry Harlow Found That the Social and Cognitive Deficits Exhibited

Harry Harlow found that the social and cognitive deficits exhibited by monkeys raised in isolation for their first six months of life:

A) quickly disappeared when finally introduced to other monkeys.
B) remained until the monkeys reproduced and had to care for their own children.
C) were evident in monkeys raised with a wire mother surrogate but not in monkeys raised with a soft cloth mother surrogate.
D) were severe and long-lasting.