Everything you need to make a good meaningful sentence (and grammatically correct, of course), is to follow common rules. Do not forget to provide your sentence with complexity, but you dont have to make them too complicated, I mean you need to use key words, they will make your thought completed. And the second point is that you need to properly organize the sentence using correct word order.
C. eagerly is the answer as it's an adverb!
HOPE IT HELPS UH
The History of kindness and it’s effect on society
C. "During the construction of the amphitheater some formwork was accidentally moved before the concrete in the vault had completely set, killing twenty-five slaves, their foreman, and a senator observing the work from the ground." D. "Stables and storerooms around the central courtyard were also rented out."