How many rectangles are in the following figure?
[asy]
size(80);
draw((0,0)--(3,0)--(3,4)--(0,4)--cycle);
draw((0,2)--(3,2));
draw((0.75,2)--(0.75,0));
draw((2.25,2)--(2.25,0));
[/asy]
<spanclass=′latex−bold′>(A)</span>5<spanclass=′latex−bold′>(B)</span>6<spanclass=′latex−bold′>(C)</span>7<spanclass=′latex−bold′>(D)</span>8<spanclass=′latex−bold′>(E)</span>9