Final answer:
Option (A), The normal body temperature for an adult ranges from 36.5-37.5 °C (97.7-99.5 °F). It is raised by pyrogens produced by the immune system, which affect the hypothalamus.
Step-by-step explanation:
The normal body temperature range for an adult is approximately 36.5-37.5 °C (97.7-99.5 °F). This temperature can be raised above its normal range by substances called pyrogens, which are typically produced by the immune system in response to an infection.
Pyrogens act on the body's thermostat, the hypothalamus, signaling it to increase the setpoint temperature, thereby causing a fever. So, the correct answer representing the normal body temperature range and what stimulates the body to raise its temperature is A) Body temperature range: 36.2 - 37.5; Stimulated by pyrogens.