A & B, Without the Benefit of Marriage Lived Together

A & B, without the benefit of marriage lived together as husband and wife. They had no legal impediment to marry one another. A was engaged in business. B was at home taking care of their children and the household chores and helping A once in a while in the business but without any compensation. If the relationship ends, is B entitled to a share?

A) A & B are governed by the law on co-ownership that they are entitled to a share of 50-50 over the properties acquired during their coverture.
B) They are governed by a special form of co-ownership that even if she did not contribute materially to the acquisition of the properties, she is entitled to ½ because of the presumption of equal contribution.
C) B is not entitled to a share of the properties because she never contributed to the common fun