In the figure shown, the radius of the larger circle is twice that of the ... ...

In the figure shown, the radius of the larger circle is twice that of the smaller circle. If the circles are concentric, what is the ratio of the shaded region’s area to the area of the smaller circle?
(A)    10:1
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Nova Math - Problem Set J: Geometry