Which best describes the practice of alchemy? alchemy was scientific, because scientists practiced it. alchemy was scientific, because it included observations and experiments. alchemy was pseudoscientific, because beliefs came before any observations of success. alchemy was pseudoscientific, because some successful experiments inspired others

I believe the answer is Alchemy was scientific because it included observations and experiments 

Even though later on most people aware that alchemy is practically impossible, people in the past actually studied it with scientific method.
Alchemy believe that you could transform core matters in the universe (such as turning Gold into stones).
In the quest to do this, many scientists actually follow an actual scientific method in order to find the truth about the possibilities, using observations and experiments