Sarah got a new credit card and has already charged $100 on it. But, she is paying her minimum payments, $20, on time before the end of her grace period. She has an introductory APR on her card of 0% for one year. After the introductory period expires, the APR is 17.99%. How long will it take her to pay off the balance on the card?

A.

nine months

B.

four month

C.

two months

D.

five months