The answer is: St. Petersburg
Answer: D
An idiom is a funny saying/phrase. It does not serve as any criminal law or military action. It doesn't mean a foolish person, but it is just an artistic style used in some texts.
Hope this helps you!
Answer:
An unhappy one because he came in and conquered many new lands, forcing the conquered people to accept his customs.
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The answer would be the 2nd option.