The answer is Joplin but don’t quote me on it ahhaha
The phrase <em>the antique fire truck </em>is used as a complete subject, because you are including all of these words to form a subject, so it cannot be a simple one (just one word). It isn't a compound subject either, because that would be two or more words connected with a conjunction <em>and, </em>or some other one.
The correct answer is D. <span>D."Be careful!" he exclaimed. "That bridge is not stable!". When writing a direct quotes, the sentence inside the quotation marks should start with a capital letter. Also, when continuing the sentence after the quotation mark, the letter should not be capital unless it is a proper noun.</span>