Each corner cube is removed from this 3 cm×3 cm×3 cm cube. The surface area of the remaining figure is[asy]draw((2.7,3.99)--(0,3)--(0,0));
draw((3.7,3.99)--(1,3)--(1,0));
draw((4.7,3.99)--(2,3)--(2,0));
draw((5.7,3.99)--(3,3)--(3,0));draw((0,0)--(3,0)--(5.7,0.99));
draw((0,1)--(3,1)--(5.7,1.99));
draw((0,2)--(3,2)--(5.7,2.99));
draw((0,3)--(3,3)--(5.7,3.99));draw((0,3)--(3,3)--(3,0));
draw((0.9,3.33)--(3.9,3.33)--(3.9,0.33));
draw((1.8,3.66)--(4.8,3.66)--(4.8,0.66));
draw((2.7,3.99)--(5.7,3.99)--(5.7,0.99));
[/asy]<spanclass=′latex−bold′>(A)</span>19 sq.cm<spanclass=′latex−bold′>(B)</span>24 sq.cm<spanclass=′latex−bold′>(C)</span>30 sq.cm<spanclass=′latex−bold′>(D)</span>54 sq.cm<spanclass=′latex−bold′>(E)</span>72 sq.cm