If you're asking for main idea, the main idea or thesis statement sentence is sentence 1, where they explain what the passage is about.
The correct answer should be A. people and E. ruler
Great is an adjective, Montezuma and Aztec are proper nouns, while people and ruler are common nouns.
Making time to do your work and trying to get the right answers, studying and turning things in early or on time, making sure everything is complete
D. A colder climate Buck has never experienced
