In one study of more than 900 New Zealanders,emotionally reactive and impulsive 3-year-olds developed into somewhat more impulsive,aggressive,and conflict-prone 21-year-olds.This best illustrates the long-term stability of

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The study suggests that the emotional reactivity and impulsivity observed in 3-year-olds persisted into their adult years, indicating that temperament is stable over time. The other choices, such as adaptive capacity, epigenetic marks, and shared family environments, do not directly address the long-term stability of individual traits or dispositions.

In One Study of More Than 900 New Zealanders,emotionally Reactive