Which of the Following Is a Real-World Example of Tying

Multiple Choice

Which of the following is a real-world example of tying?

A) A movie theater charges senior citizens a cheaper price for movie tickets than it charges non-senior citizens for the same movie ticket.
B) Sam's Club® warehouses sell bulk quantities of macaroni and cheese for a cheaper per unit price than a grocery store, but the boxes are packaged together so that the customer must buy six boxes at a time.
C) An airline charges more for a first-class ticket than for a coach ticket.
D) The manufacturer of an instant-prints camera is the only manufacturer of the film that the camera uses.