Solve the Problem $$x ^ { 2 } - 5 x - 6 \leq 0$$

Multiple Choice

Solve the problem.
- $$x ^ { 2 } - 5 x - 6 \leq 0$$

A) $( - \infty , - 1 ]$ or $[ 6 , \infty )$
B) $( - \infty , - 1 ]$
C) $[ - 1,6 ]$
D) $[ 6 , \infty )$