D this question doesn't make sense
You should capitalize "I" when you use it. That will help you get better grades.
Well saying dunno is an error in formal/academic writing. In academic writing you would have to write, i do not know, though.
Answer:
Spectator
Explanation:
Spectator is defined as "a person who watches at a show, game, or other event." This definition is closest to "one who watches," so this is your answer.
