Sheps & Shaps LLP Contracted to Receive a Weekly Delivery

Sheps & Shaps LLP contracted to receive a weekly delivery of 10 cartons of 8 x 11 bond paper and 5 cartons of 11 x 14 bond paper.This Tuesday,however,their supplier delivered 15 cartons of 8 x 11 bond and 10 cartons of 8 x 14.The office manager refused to accept the delivery.Which of the following would you identify as the source of law that allows contractual terms regarding quantity to be imposed?

A) the Customs in Trade Act
B) the Business Efficacy Act
C) the Sale of Goods Act
D) the Rules of Construction Act