What is considered the normal range for adult human body temperature?

The normal range for adult human body temperature is typically recognized as 97°F to 100.4°F. This range emphasizes that a healthy adult can have a body temperature that fluctuates within these limits, with 98.6°F often cited as the average. Body temperature can vary slightly based on the time of day, activity level, and individual physiology, which is why the established range accommodates these variations.

In choosing this range, it is also important to consider that slight deviations do not necessarily indicate illness; rather, they can occur due to environmental changes or metabolic activity. The option reflects an understanding of the variability present in healthy individuals, making it the correct choice.