AHSME 1962 Problem 26

For any real value of $x$ the maximum value of $8x - 3x^2$ is: $\textbf{(A)}\ 0 \textbf{(B)}\ \frac{8}3 \textbf{(C)}\ 4 \textbf{(D)}\ 5 \textbf{(E)}\ \frac{16}{3}$