A system of two linear equations is graphed on a coordinate plane. If the system has infinitely many solutions, which statement must be true?
A. On the graph, there are no points (x, y) that satisfy both equations.
B. On the graph, there is exactly one point (x, y) that satisfies both the equations.
C. On the graph, any point (x, y) that satisfies one of the equations cannot
satisfy the other equation.
D. On the graph, any point (x, y) that satisfies one of the equations must also
satisfy the other equation.