Monkeys Raised in Total Isolation Have Been Observed to

Monkeys raised in total isolation have been observed to

A) quickly explore their surroundings when placed in a strange situation.
B) become very fearful or aggressive when brought into close contact with other monkeys their age.
C) form a close attachment to the first monkey with whom they experience bodily contact.
D) show complete apathy and indifference to the first monkeys they encounter.