Out of these options, the right answer is
D. It's most important to determine whether or not a source is reliable before using it
The other three choices here are very false, in fact.
Internal; it says he suffered terribly from boredom and loneliness which has to do with himself
It's <span>a comparison between two things, typically on the basis of their structure and for the purpose of explanation or clarification.</span>
Answer: A) The writer could make the tone more academic.
Explanation: The tone of a text or sentence is the author's or speaker's attitude towards the audience, the subject or even the characters of the text. There are many different kinds of tones, like: positive, negative, objective, sad, angry, etc. From the given options, the one that represents how the excerpt could be best improved, is the corresponding to option A: A. The writer could make the tone more academic, by avoiding expressions like "totally important," "tons," and "it's obvious."
Still trying to get you to understand the story