Solve the Radical Equation, If Possible $$\sqrt { 49 m ^ { 2 } - 4 m + 10 } = 7 m - 8$$

Multiple Choice

Solve the radical equation, if possible. $$\sqrt { 49 m ^ { 2 } - 4 m + 10 } = 7 m - 8$$

A) $\left\{ \frac { 1 } { 2 } \right\}$
B) $\{ - 2,2 \}$
C) $\left\{ - \frac { 1 } { 2 } , \frac { 1 } { 2 } \right\}$
D) \{ \}