Choose the sentence that would make the best topic sentence in a paragraph on credit cards.
 A.
 Some banks start charging interest from the day consumers use the card.
 B.
 Students should watch out for unexpected fees when they get a credit card.
 C.
 One credit card has no annual fee, but it charges ten dollars a month for maintenance.
 D.
 The interest rate can jump to nearly 60 percent per year.