The map supports answer C.
The countries not included in the original alliance system were pulled into the war because they had alliances with the countries within the original alliance system. That they promised to be on their side should there ever be a war. However, this caused many conflicts because some countries had alliances with both sides.
Hope this helps.
He believed any future insurrection would be led by them. The Kulaks who were declared "enemies of the people" were left homeless and without a single possession. The people were forbidden by law to aid dispossessed Kulak families.
Stalin believed any future insurrection would be led by kulaks