The correct answer is A. lunches and river.
A common noun is concrete - it refers to something you can touch, feel, something that surrounds you; words such as desk, mirror, rug, are all common nouns.
B is incorrect because those are proper nouns, meaning they refer to the names of people or places. C is incorrect because eat is a verb, and side is an abstract noun. D is incorrect because both words are verbs.
its c, someone reported my answer and it got taken down last time
I believe the correct answer is: D. The author humanizes the
prion with playful language by saying "[i]f it manages to burrow into a
corner."
In this excerpt from "Mad Cow, Furious Farmer”, the example
in which the author keepings a lively tone even while discussing a disease is:
"[i]f it manages to burrow into a corner."
As opposed to the terminology author uses (such as: bovine
spongiform encephalopathy (BSE)), the informal language of more commonly
understandable comparison gives the lively tone to this excerpt, even though he
is addressing the serious disease. Other example of this would be: "a
little bit squishy and maybe a little bit sticky".
Historical fiction in my opinion would be to put the reader right there in the past. So my best answer would be B.