Final answer:
France and Great Britain did not betray Poland by refusing to provide support. They had signed mutual defense treaties with Poland and were prepared to provide assistance if Poland was attacked by Germany.
Step-by-step explanation:
The correct answer is b. In order to 'appease' Hitler, France and Great Britain betrayed Poland by refusing to provide support.
During the time leading up to World War II, France and Great Britain pursued a policy of appeasement towards Hitler's territorial ambitions. This policy involved making concessions and giving in to his demands in order to avoid war. One of the most notable instances of appeasement was the Munich Agreement, where France and Great Britain allowed Germany to annex parts of Czechoslovakia in exchange for peace.
However, France and Great Britain did not betray Poland by refusing to provide support. In fact, they had signed mutual defense treaties with Poland and were prepared to provide assistance if Poland was attacked by Germany.