Answer:
The correct option is;
A) Investigational drug service
Explanation:
An investigational drug, also known as an experimental drug is a drug which are used in human clinical trials to test its efficacy in treatment of a stated condition such that permission for the the drug trial is first obtained from the administrations such as the Food and Drug Administration (FDA) in the United State of America or the European Medicines Agency (EMA) in Europe.
Smooth muscles, also known as nonstraited, are involuntary muscles due to the reason that you can't control these muscle movements. Examples of where these muscles might by are by the internal organs or even places such as your blood vessels.
I believe it’s things that benefit you’re physical health(body) so like going on a run