AHSME 1950 Problem 8

If the radius of a circle is increased $100\%$, the area is increased: $\textbf{(A)}\ 100\% \textbf{(B)}\ 200\% \textbf{(C)}\ 300\% \textbf{(D)}\ 400\% \textbf{(E)}\ \text{By none of these}$