You are working with a 29-year-old man who has a mental illness.

The work hours are the least likely factor to be causing his current difficulties at work, because he has been working the same hours for two years without any problems. The other factors (A, C, and D) are more likely to affect his performance and alertness, as they can change over time or have an impact on his mental and physical well-being. For example, his medication may have side effects, his sleeping pattern/schedule may be disrupted, or his general health/mental illness may worsen or fluctuate. These factors may require adjustments or accommodations to help him succeed at work. References:

APSE CESP Practice Exam, Question 1

CESP Exam Content Outline, Domain 4, Task 4.2

CESP Handbook, page 12