What is it I’m trying to help you with
Repetitious. Those are synonyms, different words that have a similar or nearly identical meaning. Sullen and moody are adjectives that mean gloomy, morose, somber, resentful. Monotonous and repetitious are adjectives we use to signify that something is tedious, devoid of variations, dull.
The answer to this question is A
The sentence that has a positive connotation is The sound of her exuberant voice could be heard throughout the cabin.
The other sentences use words that have a negative connotation.