题目选项分析

A researcher studying corporate executives found that they tend to have “take charge” personalities, with the predominant traits of assertiveness, decisiveness, and self-confidence. The researcher concluded that people who are more “take charge” than the average person are more likely to become corporate executives.

Which of the following, if true, most seriously weakens the researcher's conclusion?

【选项】 Holding the job of a corporate executive causes people to develop “take charge” personality traits.