The last one is the correct answer. It is "It's going to be a long wait," the nurse confided. When someone is speaking, there needs to be quotation marks. Also, <em>It's</em> needs an apostrophe because that makes it stand for "It is" So the last answer is the right one.
Take key points and use them in the new speech. Make it short and sweet. Also don't use "big" words. Use words kids can/will understand, or be prepared to define them, explain them, and give an example.