The graph of a quadratic function is graphed on the grid.
x,. y,.

Which answer choice best represents the domain and range of the function?
A
Domain: all real numbers
Range: y ≤ −4
B
Domain: x > 0
Range: y < 0
C
Domain: x > 0
Range: y ≥ −4
D
Domain: all real numbers
Range: y ≥ −4