Choose the One Alternative That Best Completes the Statement or Answers

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
Solve the equation.
- $\log _ { 6 } \left( x ^ { 2 } - 5 x \right) = 1$

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