The sentence that contains a noun clause is D. My top priority was that we get to the game on time.
Explanation:
A <u>noun clause</u> is a clause -a group of words that includes a subject and a verb that work together as one part of speech- that plays the role of a noun. <u>Noun clauses</u> are always going to be dependent clauses that cannot stand alone and could function as a subject, object, preposition, adjective complement or subject complement, like in sentence D. The <u>noun clause</u> in sentence D is <em>that we get to the game on time</em>, that is functioning as a subject complement of the verb <em>was</em>.