I believe the answer to your question would be young adults who want to stay healthy.
Think: How would you get anywhere without one of these things. I would say the answer is C, choosing a topic. You can complete any of these steps without choosing what you will be working on.
Mountains observe everything and know everthing
Chapter 2 summary:
After coming back from Connecticut, Mitty had tons of homework, not to mention, ten pages of notes. At school the next day, his friend Derek, goes on and on about the anthrax murders. After school, Mitty starts on his notes, but decides to skip to his rough draft instead. Mitty continued to read about smallpox, everything happening to the people he is reading about could be happening to him too
The answer to the question genetic modification of cash crop foods are Audience: people who care about their food and Purpose: let people know more about food.