The revolution leading to the collapse of the Romanov dynasty contributed to the withdrawal of which country from World War I

The north had all of the following advantages over the south, excepta expansive industry to maintain their economyb. a large number of educated professional officers and soldiersc. a strong central governmentd. control over the major trade routes select the best answer from the choices provided

The social contact theory states that

What were the death camps? who was sent there?