Answer:
how you view the problem
Explanation:
A way to determine something stressful depends on how an individual view the problem or an individual's perception of the problem.
What might look stressful to Mr. A might not be stressful for Mr. B. As a result, it depends on each person's view on the problem. Some persons can thrive more under pressure and perform very well while some will likely collapse under pressure. Also, some persons can multitask while some, see multitasking as a whole lot of stress for their brain.
Therefore, an individual's perception or view on a particular problem will determine how stressful it is.