Find the Domain and Range of the Quadratic Function Whose $x = - 1$

Multiple Choice

Find the domain and range of the quadratic function whose graph is described.
-The minimum is 15 at $x = - 1$ .

A) Domain: $( - \infty , \infty )$
Range: $[ 15 , \infty )$
B) Domain: $[ - 1 , \infty )$
Range: $[ 15 , \infty )$
C) Domain: $( - \infty , \infty )$
Range: $( - \infty , 15 ]$
D) Domain: $( - \infty , \infty )$
Range: $[ - 1 , \infty )$