No Tree Too Tall, Inc. is planning to borrow $12,000 from the bank. The bank offers the choice of a 12 percent discount interest loan or a 10.19 percent add-on, one-year installment loan, payable in 4 equal quarterly payments.

What is the effective rate of interest on the 10.19 percent add-on loan?

a. 16.99%
b. 9.50%
c. 15.22%
d. 22.05%
e. 10.19%