The correct answer is D. Working in a containment zone is very dangerous.
Step-by-step explanation:
The excerpt from "The Hot Zone" describes the thoughts of a female character called Nancy as she needs to get to a Level 4 zone (highest level in biosafety zones) and work in this. During the excerpt, the narrator shows how the narrator perceives this place as dangerous and is quite worried about this. This can be seen in "which was full of the pressure of life trying to get inside your suit" that shows how Nancy is afraid of getting infected with a bacteria, virus or pathogen in the zone, or in "This was high-hazard work" that shows the apprehension of Nancy for the zone and the work she has to do in there. Thus, the central idea or point is "Working in a containment zone is very dangerous".