The answer is letter
D.
<span>
Communicable diseases
are also known as infectious or contagious diseases. They may come from food,
water, animals, another person, or anything that comes from the environment. <span>Airborne
viruses, bacteria, blood, and bodily fluids can cause the spread of these
diseases. The most common communicable disease is the flu, which can easily
spread in an enclosed environment with a recycled circulating air (e.g.
air-conditioning). Infectious disease caused by blood contact like HIV/AIDs are
also dominant in society. </span></span>
They are called lymphocytes, which are a type of white blood cell. I hope this helps! :)
B. The meeting agenda.
The meeting agenda is an over of the meeting and what is to be expected or gone over.
Is there only one answer to the question? If so, I would guess communicating. Although analyzing influences and setting goals could be correct as well.