How Can You Make a Payment Method Store Entire Credit

Multiple Choice

How can you make a payment method store entire credit card numbers?

A) For security reasons, there are no native ways for doing that.
B) Pass the credit card number to the payment method: it will be stored automatically.
C) Change the protected property of payment method $_canSaveCc to true.
D) Configure your method to save the card number by setting 1 to the following xpath:  default/payment/_NAME_/save_cc