AMC 8 1987 Problem 20

"If a whole number $n$ is not prime, then the whole number $n-2$ is not prime." A value of $n$ which shows this statement to be false is $\textbf{(A)}\ 9 \textbf{(B)}\ 12 \textbf{(C)}\ 13 \textbf{(D)}\ 16 \textbf{(E)}\ 23$