Answer:
B) Category B
Explanation:
Centers for Disease Control and Prevention along with US Department of Homeland Security has classified biological agents into three categories based on the level of mortality, ease of spreading and the level of preparedness required to deal with them. These biological agents are mostly microorganisms which if not controlled can create a havoc on a big scale.
Category B consists of agents which have moderate potential for dissemination. These are the agents which effect food and water quality and lower down their safety levels. They moderately affect the population and mortality rate is low. However, uncontrolled they can spread and effect many people. For example, salmonella and zika.
Answer:
Public Service Announcement (abbreviated PSA)
That is correct- the heart pumps and the smooth muscles of arteries contract (also called constriction)
