In Classic Research on Young Monkeys That Had Been Socially

In classic research on young monkeys that had been socially isolated, what did Suomi and Harlow (1978) find?

A) Young monkeys isolated for three months were unable to catch-up from the social isolation.
B) The first six months of life were a critical period for social interaction.
C) Monkeys isolated for the longest period were less passionate and more withdrawn.
D) Longer periods of social isolation did not lead to more devastating social effects.