Answer:
D. These are headings that give titles to the topics being discussed in the paragraphs after them.
Step-by-step explanation:
Step 1.) Find the answers that you know can not be right or the ones that do not make sense, like option C. These are conclusions that summarize all of the information in the paragraphs before them. The paragraph before the underlined text, in the passage, talks about you going to school and getting the Flu and driving to the doctors. This does not explain the reason why the pharmacy is out of flu shots. Also you can eliminate option B. These are summary points so that the reader could just read these lines and understand the passage. The underlined text does not explain the paragraph before it or after it. So now you have eliminated half of the answer choices.
Step 2.) Read the passage over again, and look closely at the questions you have left. We now have options A. These are answers to topic questions, and the paragraphs after them explain the answers and D. These are headings that give titles to the topics being discussed in the paragraphs after them left. Now compare the 2 answer choices choice A. says that the underlined text are answers to topic questions, But the underlined text is a question not an answer and the paragraph after it is not explaining an answer it is the answer to the underlined question. So thus it must be answer D., but just to make sure we must look at it too. Choice D. says that the underlined text is a heading for the paragraph and the topics being discussed after it. The underlined text is asking a question and the paragraph after it is answering it so thus means that the answer is D.
Step 3.) Now that you have the answer you can go and answer your question, or if you already did then you can use these steps later on another question you are having trouble answering.
I hope this helps =3