In the figure, what is the ratio of the area of the gray squares to the area of the white squares?
[asy]
size((70));
draw((10,0)--(0,10)--(-10,0)--(0,-10)--(10,0));
draw((-2.5,-7.5)--(7.5,2.5));
draw((-5,-5)--(5,5));
draw((-7.5,-2.5)--(2.5,7.5));
draw((-7.5,2.5)--(2.5,-7.5));
draw((-5,5)--(5,-5));
draw((-2.5,7.5)--(7.5,-2.5));
fill((-10,0)--(-7.5,2.5)--(-5,0)--(-7.5,-2.5)--cycle, gray);
fill((-5,0)--(0,5)--(5,0)--(0,-5)--cycle, gray);
fill((5,0)--(7.5,2.5)--(10,0)--(7.5,-2.5)--cycle, gray);
[/asy]
<spanclass=′latex−bold′>(A)</span>3:10<spanclass=′latex−bold′>(B)</span>3:8<spanclass=′latex−bold′>(C)</span>3:7<spanclass=′latex−bold′>(D)</span>3:5<spanclass=′latex−bold′>(E)</span>1:1