PART B: Which of the following quotes best supports the answer to Part A?A.“The first mass executions took place shortly after the Soviet Union and NaziGermany signed a treaty of “Friendship and Cooperation” in August 1939, andboth countries invaded Poland (the Wehrmacht from the west and the Red Armyfrom the east).” (Paragraph 19)B.“The second wave of murders followed the staggeringly successful June 1941invasion of the Soviet Union—in brazen violation of the 1939 treaty—by theWehrmacht.” (Paragraph 22)C.“His solution was to order a crackdown that started with the arrest of eight topAir Force generals, and continued—during the desperate “Battle ofMoscow”—with the execution of at least 300 Red Army high-ranking officers andgenerals.” (Paragraph 23)D.“As the supreme commander, Stalin prohibited the Red Army to retreat andfrequently ordered the troops to fight hopeless battles against the superblyequipped Wehrmacht Khrushchev, who served in the war as a politicalcommissar, charged in his memoirs that Stalin’s conduct of the war “cost usmuch blood.”” (Paragraphs 25-26)