If One Case of Winston Brand Chocolate Molds Costs $10

If one case of Winston brand chocolate molds costs $10.00, but a single order for 10 cases costs a total of $94.00, it is MOST accurate to say that:

A) someone in the manufacturer's book keeping department made an error.
B) the manufacturer offers a cash discount.
C) the manufacturer offers a cumulative quantity discount.
D) the manufacturer offers a noncumulative quantity discount.
E) the manufacturer offers a trade discount.