Answer: Japan
Explanation: On December 7, 1941, Japan staged a surprise attack on Pearl Harbor, decimating the US Pacific Fleet. When Germany and Italy declared war on the United States days later, America found itself in a global war.
The industrial revolution indeed was a great factor in the growth of population in industrialized countries. The population in industrialized countries had a sudden rise or increase due to the bigger and greater opportunities provided by the country thus, alluring more people to migrate.
A.
But technically, the U.S.'s largest trading partner is the European nations, with 270k exports, compared to Canada's exports - 310k.
D. Japan took over control of Manchuria from Russia
