Why Does the Baby Boomer Generation Tend to Choose a Common-Law

Why does the baby boomer generation tend to choose a common-law union over a formal marriage?

A) Because common-law unions are more common among their age cohort
B) Because common-law unions are financially more viable
C) Because common-law unions cause less strain among the Boomers' adult children
D) Because common-law unions allow Boomers more freedom to leave the union, if they so desire