How can the influence of a third variable be shown on a two-dimensional graph?A) by allowing the relationship to be nonlinearB) by allowing the position of the relationship line or curve to shift on...

How can the influence of a third variable be shown on a two-dimensional graph?A) by allowing the relationship to be nonlinearB) by allowing the position of the relationship line or curve to shift on the graphC) by drawing a third axis coming out of the two axesD) by super-imposing the third variable on the two-dimensional graph