Which of the Following Is Not an Example of a Way

Multiple Choice

Which of the following is not an example of a way a seller can increase switching costs?

A) Creating a product line compatible with parts that are made by other manufacturers
B) Offering coupons that tie discounts to the completion of a series of transactions
C) Offering warranties if product is not serviced at authorized dealer
D) Bundling complementary products that fit together in a product line
E) Offering "frequent customer" points that tie promotions to the completion of a series of transactions