The roots of the determinant equation $\left(\text{in }x\right)$ $\left|\begin{array}{ccc}a& a& x\\ m& m& m\\ b& x& b\end{array}\right|=0$

• A

  $x=a,b$

• B

  $x=-a,-b$

• C

  $x=-a,b$

• D

  $x=a,-b$