题目：What does the remark: “Studying history, we will understand why there were rises and falls of powers; Observing other people's success and failure, we will know what to and what not to do.” imply?
A. Rises and falls of powers are very important.
B. We always don’t know what to and what not to do.
C. It’s meaningful for us to study history and learn from other people’s stories.
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