Kanesh Is Trying to Think About Many Difficult Issues Right

Kanesh is trying to think about many difficult issues right now. Which thought should be the most stressful because it has the least number of stress mediators?

A) Thinking about his challenging exam scheduled for tomorrow
B) Thinking about the severe storm that is predicted to happen in three days
C) Thinking about his sister, who is a journalist in a distant, hostile region
D) Thinking about the new car he might need to buy within the next couple of years