Supporters of using the atomic bomb at the end of World War II believed thatA. Japan might win the war if the bomb was not used. B. Americans were tired of war and the US should end it quickly. C. Russia was developing a bomb and the US needed to use it first. D.Japan was developing a bomb and the US needed to use it first.

Step 1: Define the Problem

Identify the key components of the question that need to be addressed: Determine which statement best represents the belief of supporters for using the atomic bomb at the end of World War II.

Step 2: Break Down the Problem

Analyze each option to understand the rationale behind the use of the atomic bomb:

• Option A: Japan might win the war if the bomb was not used.
• Option B: Americans were tired of war and the US should end it quickly.
• Option C: Russia was developing a bomb and the US needed to use it first.
• Option D: Japan was developing a bomb and the US needed to use it first.

Step 3: Apply Relevant Concepts

Consider historical context and motivations:

• Option A: Not historically supported as Japan was already on the defensive.
• Option B: Historically accurate; the US wanted to end the war swiftly to avoid further casualties.
• Option C: While the US was aware of Soviet developments, this was not the primary reason.
• Option D: There is no historical evidence that Japan was close to developing an atomic bomb.

Step 4: Analysis, Verify and Summarize

Analyze the historical context: The primary motivation for using the atomic bomb was to bring a swift end to the war and minimize further American casualties, aligning with Option B.

Final Answer

B. Americans were tired of war and the US should end it quickly.