Which option best compares the two equations? A. The solution set of the second equation is a line parallel to the line that is the solution set of the first equation. B. The solution set of the second equation is a plane perpendicular to the line that is the solution set of the first equation. C. The solution set of the second equation is a plane parallel to the line that is the solution set of the first equation. D. The solution set of the second equation is a plane parallel to the plane that is the solution set of the first equation.