Harlow's Monkey Research and Freud and Dann's Observation of War

Harlow's monkey research and Freud and Dann's observation of war orphans suggest that the major contribution that a parent makes to social development is _____ , and that peer contacts _____ .

A) to promote the development of adaptive social behaviors; provide a sense of security
B) to provide a sense of security; promote the development of adaptive social behaviors
C) ensuring that infants survive; promote the development of adaptive social behaviors
D) to provide security and promote adaptive social behaviors; foster role-taking skills and long-lasting friendships