Answer:
B. the ability to add nuts and berries to their diet when meat was in short supply, and D. and the ability to migrate.
Explanation:
The military leader that ended the slave revolt led by Spartacus was Crassus - Marcus Licinius Crassus - was a Roman General and politician. He helped to transform the Roman Republic into the Roman Empire.
At the start the Roman Republic did not care much for the rebellion led by Spartacus when they noticed that it was unstoppable, the Senate gave the task to end it to Crassus.
Stalin wanted governments who were loyal and friendly to the Soviet Union, to act as a buffer zone against potential future German aggression. It was agreed Poland would be reorganized under a communist provisional government and free elections would be held at a later date.