Answer:
The United Nations! The United Nations is an international organization founded in the year of 1945 after the Second World War by sveral countries committed to maintaining international peace and<u> security</u> , developing friendly relations among nations,countries and regions and promoting better living standards and human rights. The UN would definetly respond to such a conflict!!! Its their sole purpose to KEEP Peace or to help nations in wartime, And more!!!
It been at least 15 years
Germany invaded Poland on September 1st 1939
The answer is A I hope this helps