Decide What Values of the Variable Cannot Possibly Be Solutions $$( x + 6 ) ^ { 2 / 5 } = ( 25 x ) ^ { 1 / 5 }$$

Multiple Choice

Decide what values of the variable cannot possibly be solutions for the equation.
- $$( x + 6 ) ^ { 2 / 5 } = ( 25 x ) ^ { 1 / 5 }$$

A) $\left\{ - \frac { 8 } { 21 } \right\}$
B) $\{ 4,9 \}$
C) $\{ 4 , - 9 \}$
D) $\{ - 4,9 \}$