Answer:
B. expository essay
Explanation:
The type of nonfiction writing described in this scenario is an expository essay.
I believe you mixed the question with these answers, because the word broached doesn't refer to any of these answers - first of all, it is a verb, and all of the options are nouns.
The meaning of this verb is <span>made a way into.</span>
I interpreted it as what one sees in mainstream media affects their perspective of the world since as they begin to consume more of it by watching television or movies they unconsciously identify what they see as the societal norm. So for example, people constantly make jokes about how high school is nothing like the movies. The mass majority only expected the movies to hold truth however because in myriads of young adult movies they would see teenagers go to parties, have sex, sneak out the house, and other things a like which normalized those actions. So essentially when someone views media that portrays consistent stereotypes of a particular group, some may tend to associate it with real life.
The definition of tranquility that is most likely suited for this line is calmness: peacefulness.
That is what the word tranquil means.