Final answer:
A cash transaction is one where payment is made in physical currency at the time of purchase. An example of a cash transaction is paying for gas at the pump with a credit card.
Step-by-step explanation:
A cash transaction is a transaction where payment is made in physical currency, such as cash or coins, at the time of the purchase. In the given options, the example of a cash transaction is
Option B: Paying for gas at the pump with a credit card.
When you pay for gas at the pump with a credit card, the payment is immediately debited from your checking account, similar to making a payment with physical cash. Unlike other options mentioned, it does not involve taking out a loan or financing.