Which of the Following Is Not a Way by Which

Multiple Choice

Which of the following is not a way by which price-discriminating firms can segment a market?

A) on the basis of time of purchase, for example long-distance calling
B) by requiring an advance purchase, for example air tickets
C) on basis of the buyer's location, for example requiring out-of-state students to pay higher tuition
D) on the basis of the supplier's marginal cost of production, for example requiring customers to pay a premium for customising options