ASAP PLEASE. THANKS :)

What is the best way to determine whether a given point is a solution to a system of equations?

A. Substitute the x and y coordinates into one equation and check to see if they work.

B. Graph the equations and see if the point lies on both lines

C. Substitute the x and y coordinate into both equations and check to see if they work

D. Solve the system of equations and compare the answer to the given point