Find the Values of the Variables for Which the Statement

Multiple Choice

Find the values of the variables for which the statement is true, if possible.
- $\left[ \begin{array} { l l l } - 8 & b & - 4 \end{array} \right] + \left[ \begin{array} { l l l } a & 9 & c \end{array} \right] = \left[ \begin{array} { l l l } 6 & 6 & - 5 \end{array} \right]$

A) $\mathrm { a } = 14 ; \mathrm { b } = - 3 ; \mathrm { c } = - 1$
B) $\mathrm { a } = - 2 ; \mathrm { b } = 15 ; \mathrm { c } = - 9$
C) $a = - 14 ; b = 3 ; c = 1$
D) $\mathrm { a } = - \frac { 3 } { 4 } ; \mathrm { b } = \frac { 2 } { 3 } ; \mathrm { c } = \frac { 5 } { 4 }$