1959 AHSME Problem 1

Each edge of a cube is increased by 50%. The percent of increase of the surface area of the cube is: \textbf{(A)}\ 50 \qquad\textbf{(B)}\ 125\qquad\textbf{(C)}\ 150\qquad\textbf{(D)}\ 300\qquad\textbf{(E)}\ 750

Full credit goes to MAA for authoring these problems. These problems were taken on the AOPS website.