Mariah is a salesperson for a cosmetics manufacturer. She typically begins her sales presentation by approaching potential customers with very expensive products even though she knows most of them will refuse such expensive cosmetics. The moment she hears a refusal from a customer, Mariah feigns a hurt expression. Customers generally feel bad about hurting salespersons and feel obliged to at least listen to what they have to say. That gives Mariah a chance to introduce her customers to other less expensive products. Mariah's sales method is an example of what technique?
a. Foot-in-the-door
b. Challenge-the-status-quo
c. Even-a-penny-will-help
d. Door-in-the-face