Consider a Closed Container Containing a 1 M Solution of HCl

Multiple Choice

Consider a closed container containing a 1 M solution of HCl, above which is air that contains water vapor at its equilibrium vapor pressure. Assume the pressure of the air and water vapor is
1 bar and the temperature of the system is 298 K. Which of the following are in their thermodynamic standard state?
I.The liquid water
II.The HCl solution
III.The water vapor

A) I only
B) II only
C) III only
D) I and II only
E) I, II, and III are all in their standard state.