题目选项分析

Airline Representative: The percentage of flight delays caused by airline error decreased significantly this year. This indicates that airlines listened to complaints about preventable errors and addressed the problems. Although delays caused by weather and other uncontrollable factors will always be part of travel, preventable delays are clearly decreasing. Which of the following most clearly points to a logical flaw in the representative 's reasoning?

【选项】Complaints may not be the most reliable measure of how many errors occurred in a given year.