The Credit Terms Offered by a Company Are 2/10, N/30

The credit terms offered by a company are 2/10, n/30, which means that

A) the customer must pay the bill within 10 days.
B) the customer can deduct a 2% discount if the bill is paid between the 10^th and 30^th day from the invoice date.
C) the customer can deduct a 2% discount if the bill is paid within 10 days of the invoice date.
D) two sales returns can be made within 10 days of the invoice date and no returns thereafter.