Consider the dark square in an array of unit squares, part of which is shown. The first ring of squares around this center square contains 8 unit squares. The second ring contains 16 unit squares. If we continue this process, the number of unit squares in the 100th ring is
<spanclass=′latex−bold′>(A)</span>396<spanclass=′latex−bold′>(B)</span>404<spanclass=′latex−bold′>(C)</span>800<spanclass=′latex−bold′>(D)</span>10,000<spanclass=′latex−bold′>(E)</span>10,404
[asy]unitsize(3mm);defaultpen(linewidth(1pt));fill((2,2)--(2,7)--(7,7)--(7,2)--cycle, mediumgray);
fill((3,3)--(6,3)--(6,6)--(3,6)--cycle, gray);
fill((4,4)--(5,4)--(5,5)--(4,5)--cycle, black);for(real i=0; i<=9; ++i)
{
draw((i,0)--(i,9));
draw((0,i)--(9,i));
}[/asy]