idk what the sentence above is, but it's probably C) Several cities with large populations have many asthma-related health problems.
B. Putting ideas and concepts together to form a conclusion.
Options two refers to the author being a teenager himself so he would be reliable for this info because it is firsthand.
Found this on the web hope it helps!
I would say D. because all of the others are basically answering the entirety of the speech. If you would discuss ways to increase the literacy rates in the U.S. you would need to go over it last after you explain why the U.S. is so illiterate.
