Answer: C

Full penalty interest means that the cardholder fails to repay the card in full on the agreed repayment date. Then you will not be able to enjoy the interest-free repayment treatment of the bank, and penalty interest will be calculated on the entire overdraft amount from the accounting date. The current overdraft interest rate of credit cards in my country is 50,000 per day. Compound interest is charged monthly, and the annualized penalty interest rate is much higher. It is much higher than the loan interest rate in the same period and has a certain punitive nature, so it is called full penalty interest.