An Electrochemical Cell with a Standard Hydrogen Electrode and a Cathode

An electrochemical cell with a standard hydrogen electrode and a cathode consisting of a metallic chromium electrode, Cr(s) , in contact with a 1.00 M chromium solution, Cr³⁺(aq) , was constructed. The voltage produced by this cell was measured at 25°C. Which statements describe the results of this measurement, assuming the conditions are ideal? The cell voltage with the appropriate sign equals ________
I. the cell potential.
II. the electromotive force.
III. the standard cell potential.
IV. the standard reduction potential for Cr/Cr³⁺.

A) I only
B) I and II
C) I, II, and III
D) I, II, III, and IV
E) III only