Answer:
Annotating means to make small notes over the article. You can underline important info and make questions that you may need to clarify. Sorry, but I doubt that anyone here is going to fully do your homework assignment.
B. monopoly
Since that company bas almost all of the long phone service, it means that the company is a monopoly because it has exclusive control over phone service in general. There's little competition, so the company can do almost anything it wants to (even raise prices they charge their customers).
C. (Sorry if I’m not right!)