Decide What Values of the Variable Cannot Possibly Be Solutions $$x ^ { 1 / 2 } = - 3 x ^ { 1 / 4 }$$

Multiple Choice

Decide what values of the variable cannot possibly be solutions for the equation.
- $$x ^ { 1 / 2 } = - 3 x ^ { 1 / 4 }$$

A) $\{ 0 , - 3 \}$
B) $\{ 0,9 \}$
C) $\{ 0 \}$
D) $\varnothing$