Researchers Studying Infants in the "Strange Situation" Have Found That

Researchers studying infants in the "strange situation" have found that most infants are

A) upset with their parents when they depart and remain upset at them when they return.
B) upset with their parents when they depart but are happy when they return.
C) not upset with their parents when they depart because they know they will return shortly.
D) happy with their parents when they depart and remain happy with them when they return.