Solve the Radical Equation $\sqrt { 3 x + 10 } - \sqrt { x + 2 } = 2$

Solve the radical equation.
- $\sqrt { 3 x + 10 } - \sqrt { x + 2 } = 2$

A) $\{ - 2,2 \}$
B) $\{ - 2 \}$
C) $\{ - 3 \}$
D) $\{ 2 \}$