The correct answer to this question is option C – The invasion of Poland The event that started the Second World War was the invasion of Poland by Germany in September 1939. The Nazi party rose to power in 1993 in Germany and took over power in every aspect of the society in Germany and other countries which they occupied. The invasion happened after Germany had secured the neutrality of the Soviet Union. Shortly after this invasion, Britain and France declared war against Germany.
The Axis powers include – Germany, Italy and Japan. The Allies power had Britain, United States and the Soviet Union. The war between Germany and the USSR started in June 1941 when Germany invaded the Soviet Union. Japan also attacked the American naval base in Hawaii Pearl Harbor. An estimate of 70 to 85 million people lost their lives in the Second World War. Hope you find this information helpful.