Answer: The sentence which contains a dependent clause that is used as an object is C. The child finally admitted that he had eaten the cookie.
Explanation: A dependent clause is a clause that cannot stand alone as a sentence because it does not express a full idea. There are three main types of dependent clauses: adjective clauses, adverbial clauses and noun clauses. In the sentence provided,<u> "that he had eaten the cookie" is a dependent clause since it does not express a complete thought.</u> Moreover,<u> "that he had eaten the cookie"</u> is a noun clause and it<u> is functioning as the direct object of the verb "admitted",</u> that is to say that "that he had eaten the cookie"<u> is the recipient of the action denoted by the verb</u>.
