You ask and answer questions
You need to post an image with it, this is much too vauge without it.
The correct option is A.
Work place violence refers to any physical assault, threatening behavior or verbal abuse that occur in the workplace. Heath care workers experience more non-fatal workplace violence than any other profession. There are many reasons why workers may not want to report violent events and this include the fact that health workers normally have the fear that reporting will reflect poorly on them.
A toxic biological substance or disease-causing organism that is hazardous to the health of people is a biohazard.