Using the Reaction Shown Below, Which Statement Is Correct

Using the reaction shown below, which statement is correct?

A) The concentration of all compounds are changing by the same amount at all times.
B) The HCl concentration increases at the same rate as the concentration of iodine.
C) The concentration of hydrogen decreases at the same rate as the concentration of ICl.
D) The concentration of HCl increases twice as fast as the concentration of iodine.
E) None of these statements is correct.