I think when it comes to substance abuse, everyone should be tested, from high ranking officials to the ordinary employees. This is because when one is proven abuser of substance, it does not only affect him as an employee but it affects him as an individual in general. When people are tested positive, termination from the job may the greatest option. This will allow the person to realize the risk of being in substance abuse.
happiness, sadness, fear, and disgust
Smooth muscles are involuntary. so it would be A for a fact.