How many literary theories are still acceptable to use in literary analysis?

Analyze how edgar allan poe's choice of setting in "the raven" to develop the speaker's character. be sure to use specific details from the poem to support your ideas.

The author’s purpose for including this in the introduction is

What is implied in this sentence from mark twain's "the ? 1,000,000 bank-note"? i was puzzled, and wanted to discuss the matter a little further, but they didn't; so i took my leave, feeling hurt and insulted to be made the butt of what was apparently some kind of a practical joke, and yet obliged to put up with it, not being in circumstances to resent affronts from rich and strong folk.