Read this paragraph:
backpacks are affecting children’s posture, says an article in children’s health today.
pediatricians treating back problems have noticed an increase in office visits from middle school- to high school-age children in certain communities. they attribute most of the visits to stress on the vertebra caused by textbooks students carry in their backpacks. they note fewer such visits in communities where online textbooks have become the norm.
if a reader wants to check the original source of information used in the paragraph, which words should the writer most likely hyperlink?
a. children’s health today
b. online textbooks
c. stress on the vertebra
d. note fewer such visits

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.