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Among fatal plane crashes that occurred during the past 70 years, r174 were due to pilot error, 89 were due to other human error, 121 were due to weather, 600 were due to mechanical problems, and 273 were due to sabotage. Construct the relative frequency distribution. What is the most serious threat to awation safety, and can anything be done about it?| Complete the relative frequency distribution below. Relative Cause Fr uen Pilot error 25.8 \"ii: Other human error 4.6 Bi: Weather 16.8 % Mechanical problems 19.? \"A Sabotage 33.1 it. {Round to one deCImal place as needed.) What is the most serious threat to aviation safety, and can anything be done about it? (Q A. Mechanical problems are the most serious threat to aviation safety. New planes could be better engineered. O B. Pilot error is the most serious threat to aviation safety. Pilots could be better trained. O C. Sabotage is the most serious threat to aviation safety. Airport security could be increased. 0 D. Weather is the most serious threat to awation safety. Weather monitoring systems could be improved