If 7 cats can kill 7 rats in 7 minutes, how long will it take 100 cats to kill 100 rats? Select
A) 5 minutes  B) 6 minutes  C) 7 minutes  D) 8 minutes  E) 9 minutes

Rationale: "it will take 7 minutes for 100 cats to kill 100 rats . 1 cat can kill 1 rat in 7 minutes , so 100 cats can kill 100 rats in 7 minutes answer c"
Answer: C