As explained in “With a Little Help From My Friends,” why did the author’s father always try to tell his American neighbors about petroleum? A. He thought Americans envied Iran's petroleum resources since America had so little.
B. He worked for an international petroleum company and liked talking about his work.
C. He knew they were fascinated by the story of how Iran's petroleum industry developed.
D. He wanted them to know that Iran was a modern country with a successful petroleum industry.

(1) fire extended humans’ geographical boundaries by allowing them to travel into regions that were previously too cold to explore. (2) it also kept predators away, allowing early humans to sleep securely. (3) fire, in fact, has been a significant factor in human development and progress in many ways. (4) other obvious benefits of fire are its uses in cooking and in hunting. (5) probably even more important, however, is that learning to control fire allowed people to change the very rhythm of their lives. (6) before fire, the human daily cycle coincided with the rising and setting of the sun. (7) with fire, though, humans gained time to think and talk about the day’s events and to prepare strategies for coping with tomorrow. the sentence that expresses the main idea is: (type the number of the sentence. then click “go.”)

If the author's last name is mentioned in the sentence, it does not need to be included in the in-text citation.

Which situation from a novel best reflects the following theme? prejudice can be found in unexpected places and is always hurtful to those exposed to it. a. community members admire a public figure until a child exposes him as a fraud b. witnesses to a violent attack remain quiet for fear of endangering their families o c. a talented doctor cannot get work in a neytown because he is an "outsider." d. a couple tries to keep their romance alive across a great distance but fails.