The graph of the quadratic function f is shown in the grid. Which of these best represents the domain of f?
A: y>=4.5
B: All real numbers less than -4 or greater than 1
C: -4<=x<=1
D: All real numbers
![The graph of the quadratic function f is shown in the grid Which of these best represents the domain of fA ygt45B All real numbers less than 4 or greater than 1 class=](https://us-static.z-dn.net/files/d9b/5969de5efdb62b35e2fd1f8c53a8a5eb.jpg)