Current Research on Passionate Love Suggests That ____

Current research on passionate love suggests that ____.

A) it is a purely Western phenomenon, and unknown in other cultures
B) it is a relatively recent phenomenon, and unheard of several centuries ago
C) it seems to be universal, though it has not always been viewed as a good basis for marriage or even a good thing
D) it seems to be universal and to be globally regarded as "true" love