Credit Terms of 2/10, N/30 Mean That If the Account

Credit terms of 2/10, n/30 mean that if the account is paid in

A) 2 days, a 10% discount will be allowed.
B) 10 days, a 2% discount will be allowed.
C) 10 days, a 30% discount will be allowed.
D) 30 days, a 2% discount will be allowed.