Two Reasons for Why Two Wages in Many Two-Parent Families

Two reasons for why two wages in many two-parent families have become a necessity are:

A) a decline in economic instability, and a decline in consumption.
B) a rise in economic instability, and increased consumption.
C) a rise in economic instability, and a decline in consumption.
D) increased probability of future divorce, and higher fertility rates
E) higher fertility rates, and caring for elderly parents.