Question

lois bought clothing at a store. she did not have enough in her bank account to pay for the purchase. after receiving the bill and paying off the balance, she realized that she paid $9.69 in interest. which statement is true about her method of payment?
○ lois used a debit card to make the purchase.
○ lois used a credit card to make the purchase.
○ lois either used a debit card or used a credit card and paid the balance in full when the bill arrived.
○ lois either used a debit card or used a credit card and made a single payment.

Explanation:

Debit cards deduct funds directly from a bank account, so no interest is charged. Credit cards allow borrowing; if the balance isn’t paid in full by the due date, interest accrues. Since Lois paid interest, she must have used a credit card. Options A, C, and D are incorrect because debit cards don’t incur interest, and paying a credit card balance in full avoids interest.

Answer:

B. Lois used a credit card to make the purchase.