What Statement Best Describes Common Findings Related to Comarital Sex

What statement best describes common findings related to comarital sex?

A) Couples who engage in comarital sex were much more popular in the 1970s and have since been on the decline.
B) Couples who engage in comarital sex often come from families where comarital sex was practiced.
C) Many couples, especially men, who practice comarital sex report that jealousy increases their sexual excitement.
D) Most couples who engage in comarital sex do not identify themselves as church-goers.