Why did a lockout take place at a factory on the right bank of the River Neva on 22 February, 1917?
(1) It was extremely cold for the workers to work, because of frost and heavy snow
(2) The workers were being forced to join the army
(3) Food shortages were deeply felt in the workers’ quarters situated on the left bank of theRiver Neva
(4) Both (1) and (3)
