Answer:
That narrows down the answer choice to Answer D.
Explanation:
The green area (the "solution") is above the dashed line y = x + 1; the dashed line is not part of the solution. This fact eliminates Answers B and C.
The green area is confined on top by the solid line y = 10 or is beneath this line. That narrows down the answer choice to Answer D.
In all cases the green area includes the left boundary x = 0.