What is one advantage of using a primary source for research?
a) a primary source shares a personal experience of an event.
b) a primary source always explains both sides of an issue.
c) a primary source is the only way to learn facts about an event.
d) a primary source has learned about an event through research.

it would be d cause refers into the pargrapgh

the excerpt from chapter 2 of "animal farm", by george orwell that is an example of foreshadowing is "these three (snowball, napoleon, and squealer) had elaborated old major's teachings into a complete system of thought to which they gave the name of animalism." animal farm is an allegory of how czarist russia developed into communist russia with all its corruption. old major's teachings represent marx's theories turned into communism, animalism, by the three pigs. this foreshadows the oppression and corruption that will follow this revolt.