When was the war or 1812

Which of the following statements is true about germany's use of u-boats?

In what way did expansion and global trade during the 15th to 18th centuries affect the economies of european countries?

What happened when spain’s government could not overcome social and economic problems during the great depression? citizen groups revolted against the government. the head of the government gave his resignation. a new leader seized control from the military rulers. the army led a rebellion against the government.