After several miles of running and sprinting in intervals, the runner’s muscles ache and feel fatigued. Which is the best explanation for what has occurred?

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully

they dont have any evidence