What does the Developer need to change in Business Manager to fulfill this requirement?

A Digital Developer has a new requirement to disable the "Discover" credit card type for all checkouts.

What does the Developer need to change in Business Manager to fulfill this requirement?
A . Checkout exclusion rules in the Merchant Tools > Site Preferences > Checkout Preferences module.
B . Credit card exclusion rules in the Merchant Tools > Site Preferences > Payment Preferences module.
C . Credit cards in the Merchant Tools > Ordering > Payment Methods module.
D . Credit card exclusion rules in the CreditCardType.json configuration file.

Answer: C

Explanation:

Reference: https://documentation.b2c.commercecloud.salesforce.com/DOC1/index.jsp