A customer wants to pay their monthly charge with a specific credit card and not use any other cards on their account. How can you accomplish this?

Marking the card specifically for recurring billings ensures that it is the designated payment method for the customer's monthly charges. This action directs the system to automatically process the payments using this specific credit card each month, without needing to manually select the card or make changes. It aligns with the customer's request to have a specific card used for these payments, thus streamlining the process and ensuring that it meets their needs.

Setting the card as the primary card for all charges may not exclusively tie that card to the recurring billing, as it could still allow for the use of other cards for different transactions. Similarly, removing all other cards could be an excessive step, as it may not be necessary if the specific card is appropriately marked for recurring payments. Informing the customer to enter payment each month would require additional effort on their part and would not fulfill the request for a specific automated payment method.