The traits of a hero are usually determined by all of these except for C - the plot of the story.
For that reason, the correct answer is probably a - cultural values, b - their experiences, d - their mentors.
It also makes sense that the different traits every hero has are rather complex when compiled together and the reasons why they have become as they have become have multiple reasons.
I think the most reasonable answer would be the second option, B. “Critical value”
Of the following, an example of eustress is getting excited about being promoted. (Option A)
Stress is defined as a normal physiological and psychological response to their circumstances. Eustress is a term used to describe stress that is motivating, positive, and enhances functioning. It is a beneficial stress which could be physical, psychological, or biochemical/radiological. The term was framed by endocrinologist Hans Selye, and literally meaning "good stress". It is the opposite of distress which refers to bad and overwhelming stress that impairs functioning. Hence, of the given options, getting excited due to a promotion is an example of eustress as it is a good or beneficial stress.
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