Lynn,a Tailor,agrees to Sew a Pair of Drapes for Zach's

Multiple Choice

Lynn,a tailor,agrees to sew a pair of drapes for Zach's living room.Zach promises to pay Lynn $300.Lynn completes the drapes using material selected by Zach,but Zach is not satisfied and refuses to pay for them.In this case:

A) whether Zach will have to pay for the drapes depends upon whether as a reasonable man he ought to be satisfied.
B) the standard applied here is a subjective standard of satisfaction.
C) the doctrine of frustration of purpose applies.
D) the condition of satisfaction is an express condition.