Mismatch experiments which involve placing high-testosterone individuals into low-status situations and low-testosterone individuals into high-status situations revealed that neither set of participants experienced elevated stress levels only high-testosterone participants experiences elevated stress levels both sets of participants experienced elevated stress levels only low-testosterone participants experienced elevated stress levels

I believe the answer is: both sets of participants experienced elevated stress levels

High testosterone individuals tend to filled with desire to 'dominate' other, which often make them feel stressful in low-status situation when they couldn't show their dominance.
Low-testosterine individuals tend to be at ease in peaceful and orderly situation. so they tend to feel stressful in high-status situation when they're surrounded by threat of competitions.

This one hard but um i have no idea i’m sorry