PlZZZ Help Branlist and 25 ptz

As Andrew, Maria and Joey sat around talking about their futures, they realized something important: while there is much that is uncertain-our health, for example, or our loves-there is also a great amount that is predictable. When prodded by Andrew's mother to state their assumptions about their future lives, all three provided rough estimates of when they would start work, roughly how much they would make, if or when they might marry and have children, whether both parents would work when the children were young, and when they hoped to retire.

The amount of money we will make depends on the type of work we choose to do, the amount of education we need to do this work, and to some extent where in the United States (or the world) we choose to work. In addition, over our lifetimes, the total income that comes into our household every year is also very dependent on our stage of life. For example, married couples with both spouses working (which is especially common in the early years of a marriage) usually make more than single individuals and also make more than married couples with only one working spouse. As another example, retired people tend to make less than people with the same skills who are still working. These changes in income are due to the changing stage of the life cycle.
Why does income for a family tend to go up when two single persons marry?

A. Married people work longer hours than single people.
B. Newly married couples tend to have two earners rather than one.
C. Two can live as cheaply as one.
D. The Federal government's marriage tax favors married people.