Decide What Values of the Variable Cannot Possibly Be Solutions $$\sqrt { x + 3 } = x - 3$$

Multiple Choice

Decide what values of the variable cannot possibly be solutions for the equation.
- $$\sqrt { x + 3 } = x - 3$$

A) $\{ 1,13 \}$
B) $\{ 1,6 \}$
C) $\{ 6 \}$
D) $\{ 6,13 \}$