Which of the Following Companies Uses Captive Product Pricing

Which of the following companies uses captive product pricing?

A) Photo Genie, which sells inexpensive cameras that run only on their own expensive batteries
B) Tune Zone, which launched a range of mp3 player models, each priced according to its features
C) Penguin's Parlor, which offers customers a 20% discount on their birthdays
D) Sportsprint, which prices sports equipment according to customer evaluations
E) Burger Den, whose combo meals are priced lower than its individual components sold together