If 6 cats can kill 6 rats in 6 minutes, how long will it take 100 cats to kill 100 rats?  Choose the most appropriate option:
A) 1 minutes
B) 2 minutes
C) 3 minutes
D) 4 minutes
E) 6 minutes
It will take 6 minutes for 100 cats to kill 100 rats.   1 cat can kill 1 rat in 6 minutes, so 100 cats can kill 100 rats in 6 minutes   Answer 6 minutes
<result>E</result>
If 6 cats can kill 6 rats in 6 minutes, how long will it take 100 cats to kill 100 rats?