Three Variables Are Related and Two of Them Are Plotted

Multiple Choice

Three variables are related and two of them are plotted in a figure.If the variable that is not measured on either the x-axis or the y-axis changes, then there is

A) a movement along the drawn curve.
B) a shift in the curve.
C) no impact on the curve because the variable is not measured on either of the axes.
D) either a shift in the curve or a movement along the curve but more information is needed to determine which.
E) None of the above answers are correct.