Decide What Values of the Variable Cannot Possibly Be Solutions $$\sqrt { 2 x + 15 } - x = 6$$

Multiple Choice

Decide what values of the variable cannot possibly be solutions for the equation.
- $$\sqrt { 2 x + 15 } - x = 6$$

A) $\{ - 7 , - 3 \}$
B) $\{ - 3 \}$
C) $\{ - 7 \}$
D) $\varnothing$