If homeowners purchased a $250,000 home with a zero-down, interest-only mortgage, and the value of the home subsequently fell to $200,000, in order to sell the house and move to another city, the homeowners would be required at closing to pay (in addition to the proceeds from the home sale):
A. nothing.
B. $50,000.
C. any transaction costs and real estate fees.
D. $50,000 plus any transaction costs and real estate fees.