Answer:
D. He completely devoured his Thanksgiving dinner.
Step-by-step explanation:
An adverb that tells "to what extent" is an adverb of degree. This means that such types of adverbs tell the extent or degree shows how much or in what degree or the intensity of how something happens.
In the given sentences, the adverbs used are of different types. And the sentence that uses the adverb of degree is sentence D with the adverb "completely" which shows the level or degree of how the dinner was consumed.
The other adverbs like "early, patiently, inside" are adverbs of "time, manner, and place" respectively.
Thus, the correct answer is option D.