Why Might a Cyano Complex of a Metal Appear Yellow

Multiple Choice

Why might a cyano complex of a metal appear yellow and the chloride complex of the same metal appear green?

A) The cyanide ions transmits yellow light more efficiently than the chloride ions.
B) The cyanide ions splits the d orbital energies more than the chloride ions,resulting in the cyanide complex absorbing yellow light.
C) The cyanide ions splits the d orbital energies more than chloride ions,resulting in the absorption band for the cyanide complex being shifted to shorter wavelengths.
D) The chloride ions splits the d orbital energies more than cyanide ions,resulting in the absorption band for the chloride complex being shifted to shorter wavelengths.
E) The chloride ions splits the d orbital energies more than the cyanide ions,resulting in the chloride complex absorbing yellow light.