Resplendent means very high quality and visually attractive
Shoddy means low quality and not visually attractive.
If someone is in an expensive, well-tailored suit, you could say they are dressed resplendently.
If someone is dressed in cheap, tattered clothes, you could say they are dressed shoddily.
C is the answer.
Wan means pale, usually from some sort of illness. It is not an antonym of resplendent.