What is the normal body temperature range for a human being?

The normal body temperature range for a human being is widely accepted to be approximately 97°F to 99°F. This range reflects the typical variations that can occur due to factors such as time of day, age, activity level, and individual physiology. Body temperature is regulated by the hypothalamus, and slight deviations from the baseline can occur frequently throughout the day due to various external and internal influences.

The choice that suggests a range of 96.4°F to 98.9°F aligns well with the recognized normal limits, as it encompasses many healthy individuals' body temperatures. The middle point of this range, about 97.5°F, is often used as an average in many health assessments, validating the significance of this option in representing normal human body temperatures.

In comparison to the other options, this selection accurately reflects a range that is broadly consistent with clinical observations and literature on human physiology. The ranges suggested in the other choices either start too high or extend into areas that are above or below typical healthy limits, thus making them less aligned with standard medical understanding of normal body temperature.