What does the word "grassroots"in Line 1, Paragraph 2 refer

What does the word "grassroots"in Line 1, Paragraph 2 refer to?A.The roots of g

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The famous modern architect of skyscrapers, Louis Sullivan,

The famous modern architect of skyscrapers, Louis Sullivan, promoted an overrid

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Oil fields are regions underlain by one or more oil pools w

Oil fields are regions underlain by one or more oil pools which are valuable u

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