Naima Ordered 100 Rolls of Film from Coltrane Photographic Supplies

Naima ordered 100 rolls of film from Coltrane Photographic Supplies.The total contract price was $200 ($20 per roll) .Which of the following statements is TRUE?

A) If Coltrane delivers 110 rolls of film,Naima must accept at least 100 rolls.
B) If Coltrane delivers 90 rolls,Naima must accept them,but she only has to pay $180.
C) If Coltrane delivers 110 rolls,Naima can keep them all and is only required to pay the contract price of $200.
D) If Coltrane delivers 90 rolls,Naima can reject them all,even if Coltrane is willing to reduce the contract price to $180.
E) If Coltrane delivers 110 rolls of film,but charges for only 100 rolls,then Naima must accept delivery and pay the price.