Question

in 1945, which country developed the first atomic bomb?
○ japan
○ the united states
○ germany
○ the soviet union

Explanation:

The Manhattan Project, led by the United States during World War II, successfully developed the first atomic bomb by 1945. Japan was the target of atomic bombings, Germany's nuclear program was not successful in developing an atomic bomb by 1945, and the Soviet Union developed its atomic bomb later.

Answer:

the United States