Plz help i’ll give you brainilist

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

Aresult of japan’s attack on pearl harbor was? a the us formed a pact with indochina against japan. b the us formed a pact with germany against japan. c thousands of americans died, and the us declared war. d thousands of japanese people died, and japan declared war.

Which economic system has become associated with authoritarian governments and total control of the economy? a. capitalism b. mercantilism c. communism d. socialism e. barter