In context with the industrial preparation of hydrogen from water gas `(CO+H_(2))` , which of the following is the correct statement ?
A. `CO` is removed by absorption in aqueous `Cu_(2)Cl_(2)` Solution.
B. `H_(2)` is removed through occlusiion with `Pd`.
C. `CO` is oxidized to `CO_(2)` with steam in the presence of a catalyst, followed by absorption of `CO_(2)` in alkali.
D. `CO` and `H_(2)` are fractionally separated using differences in their densities.
