选择题
2005 AMC 8 Problem 16: Martian Socks
A five-legged Martian has a drawer full of socks, each of which is red, white or blue, and there are at least five socks of each color. The Martian pulls out one sock at a time without looking. How many socks must the Martian remove from the drawer to be certain there will be 5 socks of the same color?
A.
6
B.
9
C.
12
D.
13
E.
15