Question: Harlow's monkey experiments demonstrated: Need Assignment Help?
Option A: the need for social interaction in primates
Option B: that a lack of social interaction in primates for long enough can cause permanent damage.
Option C: that a surrogate mother can offer some comfort to baby monkeys and delay damage for a time, but isn't a substitute for actual social interaction
Option D: that scientists can be unethical and cruel to animals
Option E: All of the above are true.