Enthusiasm, helpfulness, and friendly nature are the traits of a person's personality. Peers of Michael appreciate his personality.
A personality is a behavioral, emotional, or cognitive set of qualities that a person gets from environmental and biological factors. It also includes the psychological and the motivational-based interactions.
The personality defines the friendly, helpful, and enthusiastic nature of a person. When the person shows these characteristics then they are appreciated for their good personality traits.
Therefore, Michael has a good option D. personality.
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