Answer:
Sarah's skeletal muscles and blood vessels.
Step-by-step explanation:
Homeostasis may be defined as the process of maintaining the internal environment irrespective of the change in the external or internal environment of the body.
The receptors detect the changes in the environment. During running, the individual sweats and the flow of blood increase in the body. The receptors that might located to detect this change is located in the blood vessels and in the skeletal muscles.
Thus, the correct answer is option (B).