The author of "The Corps of Discovery Expedition" states that "The expedition was considered a success..." Explain how the author creates an argument and uses evidence to support this conclusion. Use details from the text to support your answer.

In the paragraph box, write the main idea of the paragraph below. the best leaders are organized, efficient, and punctual. molly spencer, the president of the spanish club is just this type of leader. she keeps all of the club's folders and rosters neatly arranged. she has organized several events to students celebrate the spanish language, and her fund-raisers have several students pay for study spanish abroad programs. in addition, she's never been late to a meeting. molly spencer is the perfect example of a leader.