The Harlows' Research with Rhesus Monkeys, as Well as Cases

The Harlows' research with rhesus monkeys, as well as cases of isolated children such as Anna, leads us to conclude that

A) social isolation is harmful to monkeys but presents no danger to human children.
B) long-term social isolation leads to permanent developmental damage in both monkeys and humans.
C) even several months of social isolation is typically fatal to both monkeys and humans.
D) both monkeys and humans "bounce back" from long-term isolation.