These are sentences from the text. Which one shows what the text is mainly about? A The direction of the sweep was the same as the direction the water flowed. B The whole southern lakeshore, 70 miles long, leaked water into the Everglades during most of the year. C Now, the federal and state governments hope to restore part of the Everglades. D When we dam a river, we turn it into a reservoir, backing water up behind the dam.
