If Someone Receives $24 from a Pawnbroker for a Watch

Multiple Choice

If someone receives $24 from a pawnbroker for a watch and redeems it one month later for $30, he has:

A) paid about 150% interest at an annual rate to borrow $24 for one month.
B) paid about 25% interest at an annual rate to borrow $24 for one month.
C) borrowed money without paying interest.
D) paid about 300% interest at an annual rate to borrow $24 for one month.
E) paid about 72% interest at an annual rate to borrow $24 for one month.