Step 1: Historical context.
After World War I, the Treaty of Versailles created the Polish Corridor, separating East Prussia from Germany and giving Poland access to the Baltic Sea. The city of Danzig (now Gdansk) became a major point of conflict between Germany and Poland.
Step 2: Hitler's expansionist policy.
Adolf Hitler aimed to expand German territory and reclaim areas lost after World War I. One of his goals was to capture the strategic port of Danzig and reunite German territories separated by the Polish Corridor.
Step 3: Propaganda justification.
Nazi Germany accused Poland of mistreating ethnic Germans living in Polish territory. These accusations were used as propaganda to justify Germany’s invasion of Poland in 1939.
Step 4: Conclusion.
Both statements are historically correct, and the reason explains the justification used by Hitler for attacking Poland.
Final Answer: Both (A) and (R) are true and (R) is the correct explanation of (A).