Answer :
Final answer:
Option B, the temperature that should be reported at once is a rectal temperature of 101.6 degrees F, as it indicates a fever and potential health issue that requires immediate attention.
Explanation:
The question asks which temperature reading should be reported at once. The correct answer is B. a rectal temperature of 101.6 degrees F. Fever in adults is defined as a body temperature above 100°F, and a rectal temperature is a reliable method for measuring body temperature, making it a significant indication of a potential health issue that requires immediate attention. Other options such as an oral temperature of 98.4 degrees F, an axillary temperature of 97.6 degrees F, and an oral temperature of 99.0 degrees F are within normal ranges for body temperature and do not typically require urgent reporting.