A family is allocating its monthly household expenditure between only two goods, food and clothing. Suppose that the price of food is $5 per unit, and the price of clothing is $10 per unit and that the marginal utility that the family is receiving from its consumption of food is currently 25. What is the family's marginal utility from its consumption of clothing if it is maximizing its utility?

A) 5

B) 10

C) 12.5

D) 25

E) 50