Question

Karlie read this excerpt from "Mad Cow, Furious Farmer." Look around your house. Think about everything held up by the walls and floors. What if, say, just one corner of your house suddenly got squishy? What if the corner wiggled with the wind? Nearby walls and pipes and roofing would bend with it. If that corner was not fixed, it could eventually ruin your entire house! That is a little like mad cow disease, a brain disease caused by a speck of material that eventually ruins the entire brain. The speck of material is called a "prion" and it is dangerous. Karlie predicts that the main subject of this excerpt is about how mad cow disease works and how it has affected people. how scientists study the brain and detect anger and madness. how prions can cause a barn to become unstable and dangerous. how farmers should protect barns and houses from cows and other livestock.

Answer 1

it is in fact A or how mad cow disease works and how it has affected people.

Answer 2

how mad cow disease works and how it has affected people. 

The introduction uses a metaphor to try and relate the way Mad Cow Disease works to something that most people can visualize. Because it sets up details about the disease and tries to make it understandable, Karlie can assume that this piece will be about the way the disease works and how people are affected.