The correct answer is option A. "determined which jobs workers would hold and where workers would live". When the Bolsheviks took control of the Soviet economy during the Civil War, they adopted War communism. According to historians, Bolsheviks wanted to keep towns (the proletarian power-base) and the Red Army stocked with food and weapons. As a result, Bolsheviks had absolute power of who would acquire a job and where people would live.
Texas and mexico had a conflict because they couldn't decide who get to claim the Rio grande because the texas government wanted to claim it and mexico also wanted to so it became a dispute