Do you think the narrator is a reliable witness to the events he describes the fall of the house of usher

I don't believe the Narrator is a reliable witness because, in a part of the book, the Narrator said he thinks Rodrick's mental illness wasn't taking its toll on him. Saying such makes the reader wonder about the mental state of the Narrator, as well. Moreover, the Narrator is also an objective witness, which means that most of what he says is an opinion. Furthermore, he may have helped Roderick Usher kill his sister, or the exposition is solely his dream.

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the correct answer is a. how to make proposal that works.

indeed, the register is quite formal and the tone is especially objective as it avoids the use of the first and second person singular (i, you) and opts instead for the third person plural which is more impersonal and focuses on the data and the argument that is being developed by the author. the formality adds the impression of respectability to the work and the impersonality adds objectivity to it.