Which Graph Best Describes How the Vapor Pressure of a Solution

Multiple Choice

Which graph best describes how the vapor pressure of a solution varies according to Raoult's law as a nonvolatile solute is added to a liquid? The vapor pressure of the solution is plotted on the y-axis, and the mole fraction of solvent is plotted on the x-axis. The origin (0, 0) is not necessarily located where the axes cross.

A) I
B) II
C) III
D) IV