If workplace temperature is comfortable but ventilation is poor, what type of problem may still occur?

Correct answer: Reduced freshness and attention

The direct answer is A: reduced freshness and attention. Comfortable temperature alone does not guarantee a healthy work environment. Ventilation brings in fresh air and helps remove stale air, excess carbon dioxide, odours, moisture, and some indoor pollutants. If air circulation is poor, people may feel stuffy, tired, drowsy, or less able to concentrate even when the thermometer shows a comfortable temperature. Option A is correct because poor ventilation can reduce freshness and attention. Option B, salary increase, has no physical connection with air movement. Option C, the wall becoming strong, is unrelated to ventilation. Option D, the chair adjusting automatically, is also unrelated; a chair does not adjust merely because air circulation is poor. The appropriate response may include opening suitable vents, improving airflow, or using a safe ventilation system. Exam cue: comfort includes temperature, air movement, air quality, light, and noise—not temperature alone.