Which wartime body coordinated Allied strategic planning across theaters?

• A. The Joint Chiefs of Staff
• B. The United Nations Security Council
• C. The Combined Chiefs of Staff
• D. The National Security Council

Answer: (C)

The main idea here is how the Allies coordinated strategic planning across multiple theaters of war. During WWII, a single joint body was created to bring together the United States and Britain's top military leaders to set overarching priorities, allocate scarce resources, and ensure unified operations across Europe, North Africa, and the Pacific. That body was the Combined Chiefs of Staff, which issued directives and guided major campaigns (like the European invasion and Pacific operations) by aligning efforts under a common strategy. The other options don’t fit because they either represent American-only structures, or postwar organizations, rather than the wartime, cross-theater alliance coordination that the Combined Chiefs of Staff provided.