A.<span>investigating a subject in order to discover or revise facts, theories, and applications
</span>
The answer is number 4) a literary critic's analysis, because it is not written by a student and it is a reliable source compared to a blog, website, or student paper.
Answer:
2. Are you having lunch?
3. Are you listening to music?
4. Is the teacher using a computer?
5. Are your friends working in class?
6. Is your friend writing an email?
7. Are you sitting at your desk?
8. Are you wearing jeans?
Note: You will have to give the true answer to these questions as answers vary from person to person.
