AMC 8 1993 Problem 12

If each of the three operation signs, $+$, $\text{--}$, $\times$, is used exactly ONCE in one of the blanks in the expression $$5\hspace{1 mm}\underline{\hspace{4 mm}}\hspace{1 mm}4\hspace{1 mm}\underline{\hspace{4 mm}}\hspace{1 mm}6\hspace{1 mm}\underline{\hspace{4 mm}}\hspace{1 mm}3$$ then the value of the result could equal $\text{(A)}\ 9 \text{(B)}\ 10 \text{(C)}\ 15 \text{(D)}\ 16 \text{(E)}\ 19$