Refer to the Passage Below to Answer the Questions That

Refer to the passage below to answer the questions that follow.
Everyone knows McDonald's,the worldwide fast food chain.McDonald's has used consumer promotions for years.Restaurants offer a kids' Happy Meal that always includes a toy,and oftentimes the package itself is a promotion,such as pumpkin buckets at Halloween.McDonald's has also used a promotion patterned after the popular Monopoly game,in which everyone wins something small,like a soft drink or French fries,but one participant could win $1 million dollars.The Monopoly promotion usually lasts several months.McDonald's also participates in promotions with movies,such as Star Wars and several Disney movies.Another promotion McDonald's is considering is a program that will give consumers one free Happy Meal for every 10 they purchase.
-The promotion in which customers receive one Happy Meal for every 10 they purchase is best described as a ________.

A) price deal
B) premium
C) tie-in
D) refund
E) loyalty program