Which of the Following Describes, Most Accurately, What the Area

Which of the following describes, most accurately, what the area of feasible solutions on the linear programming graph represents?

A) The area bordered by the intersection of the two constraint lines.
B) The area bordered by the intersection of all constraint lines.
C) The area on the graph that contains all possible combinations of products, including the optimal combination.
D) The area bordered by the intersection of all constraint lines AND the area on the graph that contains all possible combinations of products, including the optimal combination.