He could not suppress his resentment against that decision.

Answer: Option C

Excitement : a feeling of great enthusiasm and eagerness.
Contentment : a state of happiness and satisfaction.
Displeasure : a feeling of annoyance or disapproval.
Happiness : the state of being happy.
Resentment : bitter indignation at having been treated unfairly.

Synonym of Resentment is Displeasure