Respuesta :
The statement which best represents the causes of stiff muscles is that: A. stiff muscles only result from overwork.
What is a muscle?
A muscle can be defined as a type of tissue that is found within the body of an organism and it typically serves as a source of power and force to the organism, so as to enable it perform a task or work.
This ultimately implies that, stiff muscles would only result when an individual overworks his or her body.
Read more on muscles here: brainly.com/question/25285043