The Following Diagram Shows a Close-Up View of the Vapor

Multiple Choice

The following diagram shows a close-up view of the vapor pressure curves for two pure liquids and two different solutions composed of these two liquids.Which curves represent pure liquids and which curves represent the solutions?

A) Curves (a) and (b) are the pure liquids and curves (c) and (d) are the solutions.
B) Curves (a) and (c) are the pure liquids and curves (b) and (d) are the solutions.
C) Curves (a) and (d) are the pure liquids and curves (b) and (c) are the solutions.
D) Curves (c) and (d) are the pure liquids and curves (a) and (b) are the solutions.