A case contains c cartons. Each carton contains b boxes, and each box contains 500 paper clips. How many paper clips are contained in 2 cases?	Choose the most appropriate option.
A) 500 bc B) 500 b / c C) 1000 bc D) 1000 b / c E) 1000 / bc

Rationale: "2 cases * c cartons / case * b boxes / carton * 500 clips / box = 1000 bc paper clips the answer is c ."
Answer: C