This isn’t a question anybody can answer. The exposition is the first part of the book before a plot starts; the description of characters. You must read the book to find out about whoever Paul is.
Answer:
Stalin was now the autocratic ruler of the entire Soviet Union. Millions of Russians and people of other ethnic origin inside the Soviet Union had been killed during the Russian Civil War, through starvation and in other conflicts, but the bloodbath had thus far not reached within the Bolshevik Party.
The correct answer would be Visit because it is the only one that truely makes since