Correct option is D
The optimum effective temperature for human comfort is typically adjusted based on the season to account for factors like clothing insulation and outdoor conditions.
In winter, people tend to wear heavier clothing, so the optimum effective temperature is set lower to compensate. Conversely, in summer, lighter clothing is worn, so the optimum effective temperature is set higher to maintain comfort.
Effective temperature: This is a measure that considers the combined effect of air temperature, relative humidity, and air velocity on how a person perceives temperature.
