The sentence that contains an adverb clause is D: "Before we got started, we realized we didn't have time". Adverb clauses are clauses that function as an adverb in a sentence. What is more, they are used to add explanatory details as regards how or why things happen.
Adverb clauses are dependent clauses. As such, they should have a subordinating conjuction to connect them to the rest of the sentence. In this case, a when clause introduced by the conjuction "before" is the adverb clause.
Clauses that operate as an adverb in a sentence are known as adverb clauses. Furthermore, they are utilized to provide additional information about how or why things occur.
The sentence that contains an adverb clause is Before we got started, we realized we didn't have time.
Adverb clauses are also known as Dependent clauses, so there has to be a supporting clause that better explains and concludes the sentence, answering the question of 'when' (Before).
Learn more about adverb clauses: https://brainly.com/question/541212
