Suppose a Negative Income Tax Program Is Established at 25

Suppose a negative income tax program is established at 25 percent, and a poverty threshold minimum of $15,000 is guaranteed for a family of four. If the family earns $10,000 through working, its total income would equal

A) $10,000
B) $15,000
C) $17,500
D) $22,500
E) $25,000