5. What was the first successful test of an atomic bomb called? a. Operation Manhattan b. Operation Trinity c. Operation Hiroshima d. Operation Fat Man

## Step 1<br />The question is asking for the name of the first successful test of an atomic bomb. This is a historical fact-based question.<br />## Step 2<br />The first successful detonation of an atomic bomb was part of the Manhattan Project, which was a top-secret research and development project during World War II.<br />## Step 3<br />The specific test that marked the first successful detonation of an atomic bomb was called "Operation Trinity". This test took place on July 16, 1945, in the New Mexico desert.<br />## Step 4<br />The other options provided, "Operation Manhattan", "Operation Hiroshima", and "Operation Fat Man", are related to the Manhattan Project and the atomic bombings of Hiroshima and Nagasaki, but they are not the names of the first successful test of an atomic bomb.