Michael and Shawn Are Cohabitating

Michael and Shawn are cohabitating.They love each other,but sociological research predicts that,when they do marry,they will face a higher risk of divorce.Sociologists believe this is because they:

A) lived together relatively easily,so the stresses of marriage will feel more difficult.
B) don't take commitment seriously.
C) are likely more accepting of divorce.
D) will want to "try on" another relationship.