The Probability That a Cohabiting Couple Will Be Considered to Have

The probability that a cohabiting couple will be considered to have a "common-law marriage" simply because they have lived together for a while is:

A) almost 100%; almost every state recognizes common-law marriage after a period of cohabitation.
B) high; almost every state recognizes common-law marriage,although a couple may have to openly declare they are living together.
C) about 50-50; most states recognize common-law marriage,but couples have to do "married" things like file joint tax returns.
D) low; most states do not recognize common-law marriages any more.
E) almost zero; only two (small) states still recognize common-law marriages.