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 is/are in its 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 states.