When You Use a Debit Card to Purchase a Pair

When you use a debit card to purchase a pair of jeans, you are

A) creating a 30-day loan from your bank to the seller.
B) creating a 30-day loan from the seller to your bank.
C) giving your bank an instruction to transfer funds directly from your bank account to the store's bank account.
D) creating an overnight repurchase agreement between your bank and the store.