If 8 workers can build 8 cars in 8 days, then how many days would it take 5 workers to build 5 cars? Pick one:	A) 4	B) 5	C) 8	D) 10	E) 12

Rationale: "8 workers can build 1 car per day on average . 1 worker can build 1 / 8 of a car per day . 5 workers can build 5 / 8 car per day . the time required to build 5 cars is 5 / ( 5 / 8 ) = 8 days the answer is c ."
Answer: C