Read the excerpt from "the tell-tale heart.” true! —nervous—very, very dreadfully nervous i had been and am; but why will you say that i am mad? the disease had sharpened my senses—not destroyed—not dulled them. above all was the sense of hearing acute. i heard all things in the heaven and in the earth. i heard many things in hell. how, then, am i mad? hearken! and observe how healthily—how calmly i can tell you the whole story. which statement best explains how the reader can determine that the narrator of this passage is unreliable?
a the narrator is very calm as he begins to relate all of the events of the story.
b the narrator worries that his dreadful nervousness has caused him to go mad.
c the narrator says he is not mad, but he claims he can hear all the sounds on heaven and earth.
d the narrator has sharpened senses that allow him to hear sounds that others cannot.

Read the passage from sugar changed the world. sugar is a taste we all want, a taste we all crave. people throughout the planet everywhere have been willing to do anything, anything at all, to get that touch of sweetness. we even know exactly how thrilling it was to taste sugar for the first time. when the lewis and clark expedition met up with the shoshone, who had little previous contact with old world products, sacagawea gave a tiny piece of sugar to a chief. he loved it, saying it was "the best thing he had ever tasted." sugar created a hunger, a need, which swept from one corner of the world to another, bringing the most terrible misery and destruction, but then, too, the most inspiring ideas of liberty. sugar changed the world. we begin that story with a man who could never know enough. how does the conclusion of the prologue support the authors’ purpose? select two options. it introduces the topic that will be addressed next. it provides information about the authors. it states why the topic is relevant to readers. it cites sources the authors used in the text. it explains how the authors came to study the subject.