There are 6 red, 6 brown, 6 yellow, and 6 gray scarves
packaged in 24 identical, unmarked boxes, 1 scarf per
box. What is the least number of boxes that must be
selected in order to be sure that among the boxes
selected 3 or more contain scarves of the same color?
(A) 3
(B) 6
(C) 7
(D) 8
(E) 9