A uniquely human capability that has long been thought of as separating us from all other animals is ______

According to the article Let's See What This Baby Can Do about the impact of a new baby on a young family, among first time parents, the person most likely to be angry immediately following birth was:

(a) mother (b) father (c) there were no differences between parents

The foot-in-the-door technique is based on the ________ principle, whereas the door-in-the-face technique is based on the ________ principle

A) scarcity;authority B) friendship; social validation C) commitment/consistency; reciprocation D) liking; commitment/consistency