A Classic Study (Harlow and Harlow) Demonstrated That When Baby

A classic study (Harlow and Harlow) demonstrated that when baby monkeys were denied physical contact with their mothers:

A) they were able to readily transfer their affection and attachment to wire mesh substitute mothers.
B) it had no obvious effect on their subsequent development as long as they were provided with proper nutrition.
C) they grew up to be extremely maladjusted.
D) they became less vulnerable to a wide range of physical illnesses.