Which Statement Best Describes Common Findings Related to Comarital Sex

Which statement best describes common findings related to comarital sex? 

A)  Comarital sex was much more popular in the 1970s and has since been on the decline. 
B)  Couples who engage in comarital sex often come from families where comarital sex was practiced. 
C)  Those who engage in comarital sex reported higher levels of sexual satisfaction but less overall marital satisfaction compared to married couples who do not engage in comarital sex. 
D)  Those who engage in comarital sex reported happier marriages and overall life satisfaction than those in marriages who do not participate in comarital sex.