Solution:
we have been asked to choose from the given options for the Question
Which situation ONLY describes a purchase made with a debit card?
As we know that the debit card has the power of purchase exactly equivallent to the amount in your bank account.
So each time you will use the debit card, balance in your bank account gets decreased by the same amount.
So out of all the possible options , the best possible option is
Linda paid for her family's lunch with her card. Each time she uses this card her checking account decreases by the purchase amount.
Hence the correct option is (C)