Find the Domain and Range of the Quadratic Function Whose $- 6$

Multiple Choice

Find the domain and range of the quadratic function whose graph is described.
-The maximum is $- 6$ at $x = - 1$

A) Domain: $( - \infty , \infty )$
Range: $( - \infty , - 1 ]$
B) Domain: $( - \infty , \infty )$
Range: $[ - 6 , \infty )$
C) Domain: $( - \infty , - 1 ]$
Range: $( - \infty , - 6 ]$
D) Domain: $( - \infty , \infty )$
Range: $( - \infty , - 6 ]$