Answer: D is right. But there are also many other reasons.
Explanation: League of Nations was formed by Allied powers (from the WW I) so consequently it was viewed as "League of Victors". Moreover USA did not join, may other states did not join and later on League of Nations was unable the prevent outbreak of WW II.
Answer:
Invasion of the Soviet Union, June 1941 On June 22, 1941, Nazi Germany launched a surprise attack against the Soviet Union, its ally in the war against Poland. By the end of the year, German troops had advanced almost 1,000 miles to the outskirts of Moscow. Soon after the invasion, mobile killing units began the mass murder of Soviet Jews.
I hope this helped, have a great day!
