Why did the invasion of Poland launch World War II?(1 point)

A) It violated Hitler's nonaggression pact with Stalin.
It violated Hitler's nonaggression pact with Stalin.
B) It led Britain and France to abandon the policy of appeasement.
It led Britain and France to abandon the policy of appeasement.
C)It led the United States to abandon the policy of neutrality.
It led the United States to abandon the policy of neutrality.
D) It was the first time German forces used the blitzkrieg strategy.

A) It violated Hitler's nonaggression pact with Stalin.