What is captive-product pricing?

A. Selling a product or service at two or more prices, where the difference in prices is not based on differences in costs

B. Combining several products and offering the bundle at a reduced price

C. Setting a price for products that must be used along with a main product, such as blades for a razor and games for a video-game console

D. Setting a price for by-products in order to make the main product's price more competitive