The answer is C. Earn more money
Gros income is the amount of money you earn in your paycheck from work. This after all deductions (such as taxes) are dealt with. So in all it's the amount of spending money you are paid. The only real way to change this is to make more money, therefore; your answer is C.
In this case, we would assume, based upon the sample data, that approximately 60% of households would have women making the decision.
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