The 5×5 grid shown contains a collection of squares with sizes from 1×1 to 5×5. How many of these squares contain the black center square?
[asy]unitsize(6mm);
defaultpen(linewidth(.8pt));for(int i=0; i<=5; ++i)
{
draw((0,i)--(5,i));
draw((i,0)--(i,5));
}
fill((2,2)--(2,3)--(3,3)--(3,2)--cycle);[/asy]<spanclass=′latex−bold′>(A)</span>12<spanclass=′latex−bold′>(B)</span>15<spanclass=′latex−bold′>(C)</span>17<spanclass=′latex−bold′>(D)</span>19<spanclass=′latex−bold′>(E)</span>20