I think each can be considered self-harm, with cutting and burning as obvious ones. Rubbing I think won't be considered by many as one but it does still hurt so it technically is self-harm.
I'm not entirerly sure whether ANY of these statements could be considered untrue.
Socializing up to a certain extent could increase productivity, granted it would be done with work in mind.
B, C, D all are true as these are very commonplace things that can happen at the workplace, while not all are equally probable all of them could happen.
If one really is considered untrue, it most likely would be A.
Health care officials such as doctors, nurses, and dentists
Government health resources such as the centers for disease control and prevention (cdc), The National Institutes of Health (NIH), and the World Health Orginization (WHO).