Answer:
B. Imperial nations began moving further inland and governing colonial subjects.
2nd option: Changing Stalin's policies.
The term "de-Stalinization" refers to the political reforms enacted by Nikita Khrushchev.
The reforms eradicated Stalin's influence on the Soviet Union. Khrushchev condemned his predecssor's (Stalin's) actions, and his image as this infalliable leader. Khrushchev promised to revert the Soviet Union back to its self-proclaimed socialist society.
They grew crops, and started expanding, turning more colonies around into bigger ones, to eventually create the whole 13. They were still under persecution from England, so eventually, they decided to come together and form their own government, and write the constitution.