Answer:
B. Appeasement
Step-by-step explanation:
Great Britain's and France's response to Hitler's aggressive actions in the 1930s was primarily characterized by the policy of appeasement, which involved making concessions to Germany in the hopes of avoiding conflict. They believed that by giving in to some of Hitler's demands, they could maintain peace, but ultimately this approach failed to deter his ambitions and led to the escalation of the war.