Which of these personality traits has already been shown to be moderately heritable?

Name: Which of these personality traits has already been shown to be moderately heritable?
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Question

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Introversion/extroversion has already been shown to have a moderate level of heritability, with estimates ranging from 30-50% depending on the study. A and C are difficult to measure and could be influenced by environmental factors, while D is a more abstract concept that has not yet been studied for heritability.

Which of These Personality Traits Has Already Been Shown to Be