Until Relatively Recently,social Psychologists Have Limited Their Study of Interpersonal

Until relatively recently,social psychologists have limited their study of interpersonal attraction to initial encounters or first impressions.Why?

A) Long-term relationships are more difficult to study scientifically.
B) First impressions are the most important in determining relationship satisfaction.
C) First impressions tend to be the most powerful indicator of attraction.
D) It is an unethical violation of privacy to study long-term relationships.
E) Initial impressions determine what will happen over time.