A Supplier Offers Credit Terms of 2/15,net 45

A supplier offers credit terms of 2/15,net 45.This means that

A) a 2 percent surcharge will be added to any invoice not paid within 15 days.
B) all purchases must be paid in full within 30 days.
C) a monthly interest rate equal to 2/15^ths of one percent will be added to any invoice not paid within 45 days.
D) a 2 percent discount can be taken if a purchase is paid within 15 days with the full amount due in 45 days.
E) 2 percent of the invoice must be paid within 15 days with the balance paid within 45 days.