Mike has a sports collection . He has four basketballs, five volleyballs and four soccer balls. He has seven tennis rackets and eight tennis balls. He has eight ping-pong bats and nine ping-pong balls, too. Mike has some bags in his room: four yellow bags and two green bags. He puts the basketballs in a yellow bag, the volleyballs in a yellow bag, and the soccer balls in a yellow bag. He puts the tennis rackets in a yellow bag, the ping-pong bats in a green bag, and the tennis balls and the ping-pong balls in the last bag. There are _ bags in Mike' s room. A) five B) four C) two D) six
A:
D