Find Which of the Following Matrices Is an Inverse to the Matrix

Multiple Choice

Find which of the following matrices is an inverse to the matrix A below if any. $A = \left[ \begin{array} { c c } - 4 & - 3 \\- 1 & 7\end{array} \right]$ Matrix I: $\frac { 1 } { 31 } \left[ \begin{array} { c c } - 7 & - 3 \\ - 1 & 4 \end{array} \right]$
Matrix II : $\frac { 1 } { 31 } \left[ \begin{array} { c c } 4 & 3 \\ 1 & - 7 \end{array} \right]$
Matrix III : $\frac { 1 } { 31 } \left[ \begin{array} { c c } 7 & - 3 \\ - 1 & - 4 \end{array} \right]$

A) Each of the matrices I and II is an inverse of A.
B) Each of the matrices I and III is an inverse of A.
C) Matrix II is an inverse of A.
D) Matrix I is an inverse of A.
E) None of the matrices is an inverse of A.