If their talking about planning then it is a way to make your argument more organized
The sentence that is punctuated correctly and has correct capitalization is: "Have you ever seen a shooting star?" asked Terry. This is the sentence that is correctly punctuated because the rule in quoting a question sentence is applied correctly. A question mark should be put inside the quotation marks. If a question mark is used, it is no longer necessary to put a comma.
Fragments are sentences that aren't complete due to their lack of at least one independent clause. They may resemble sentences but are not when read clearly.
For the choices above, the first choice, Sarah who works at the CD store. is considered a great example of a fragment sentence and is the correct choice. I am not sure if this is a multiple choice question or a "check all that apply" question. If you are meant to choose only one answer, then go for the first one. However, if you can check more than one, then choose I and III but not II.
Let me know if you need further info. :)
- Dotz