Which one of the following best describes the term "Merchant Discount Rate" sometimes seen in news?

• A. The incentive given by a bank to a merchant for accepting payments through debit cards pertaining to that bank.
• B. The amount paid back by banks to their customers when they use debit cards for financial transactions for purchasing goods or services.
• C. The charge to a merchant by a bank for accepting payments from his customers through the bank's debit cards.
• D. The incentive is given by the Government to merchants for promoting digital payments by their customers through Point of Sale (PoS) machines and debit cards.