For number 50, please pick 1,2,3 or 4 as the answer. Thank you!

The correct answer is to prepare for control of Germany after World War II.

Explanation: At the Yalta Conference the leaders of the United States- Franklin Roosevelt, Great Britain-Winston Churchill, and Russia-Josef Stalin all met to determine what was to become of Germany after they were defeated. It was decided that Germany would be split up into four zones of occupation, with Great Britain, France, the United States, and the Soviet Union being the four countries in control.

it provided for equal trade rights among nations in china.