Suppose that when a system of linear equations is graphed, one line completely overlaps the other line. which statement is correct?

a. the system of equations has one solution because the lines intersect at one point.

b. the system of equations has one solution because the lines do not intersect at only one point.

c. the system of equations does not have only one solution because the lines intersect at one point.

d. the system of equations does not have only one solution because the lines do not intersect at only one point.