Well, it is asking you to compare Sarah's limping to something.
There are many possible answers, just think of things that limp.
Sarah limped along the road like an injured dog.
Sarah limped along the road like someone with a broken foot.
Sarah limped along the road like an elderly woman.
Answer:
C. By studying demographics
A. T<span>o inform the reader about the conditions of the place</span>
Answer:
An upward displacement of part of the earth's crust.
Explanation:
Hope this helps! :)