Solve for X $\left| \begin{array} { l l } x & 3 \\1 & x\end{array} \right| = 6$

Multiple Choice

Solve for x.
$\left| \begin{array} { l l } x & 3 \\1 & x\end{array} \right| = 6$

A) $x = 3$
B) $x = \pm 2$
C) $x = \pm 3$
D) $x = - 4$
E) $x = \pm 4$