How to prove that the narrator in tell tale heart is sane?

Read these sentences from "the yellow wallpaper." the color is repellent, almost revolting; a smouldering unclean yellow, strangely faded by the slow-turning sunlight. it is dull yet lurid orange in some places, a sickly sulphur tint to others. what tone does the author create with the word choice? o a. beautiful o b. disgusted o c. happy o d. silly

Which best identifies the figurative language used in this passage? cannon to right of them, cannon to left of them, cannon in front of them volley’d and thunder’d; storm’d at with shot and shell, boldly they rode and well, into the jaws of death, into the mouth of hell rode the six hundred.

In a short story the narrator's word choice