What are two reasons why their Coupon Code might be invalid?

A customer enters a Coupon Code in the cart and receives an error stating that their Coupon Code is invalid.

What are two reasons why their Coupon Code might be invalid? (Choose two.)
A . A Catalog Price Rule with a higher priority was already applied to the customer’s cart.
B. The Customer is assigned to a Customer Group that is excluded in the Cart Price Rule.
C. Uses Per Customer on the Cart Rule is set to 1 and the Customer has previously used the Coupon Code.
D. Uses Per Customer on the Cart Rule is set to 0.

Answer: B, C