please help

According to a report, 79.1% of murders are committed with a firearm. (a) If 200 murders are randomly selected, how many would we expect to be committed with a firearm? (b) Would it be unusual to observe 171 murders by firearm in a random sample of 200 murders? Why? (a) We would expect to be committed with a firearm. (b) Choose the correct answer below. O A. Yes, because 171 is greater than u + 20. O B. No, because 171 is greater than u + 20. O C. No, because 171 is between u - 20 and | + 20. O D. Yes, because 171 is between u - 20 and u + 20. O E. No, because 171 is less than u - 20