A - to see how you deal with stress is an example of motivation that shows the employer that you are ambitious to get a job.
It gives an impression to your employer that you care about the job, you are determined,
I think A.Retell the story from a different point of view
Perhaps the answer is A) fragility of life. Because butterflies are so tender and fragile, they might represent life itself, and how fragile it can be, and how quickly it can disappear in a second.