Final answer:
The Manhattan Project was a top-secret research program launched by the United States during World War II to develop an atomic bomb is true. The correct option is true.
Step-by-step explanation:
The Manhattan Project was a top-secret research program launched by the United States during World War II with the goal of developing an atomic bomb. It involved more than 100,000 people in various capacities, such as mining and scientific research. The project successfully detonated an atomic explosion in July 1945 and dropped two atomic bombs on the Japanese cities of Hiroshima and Nagasaki the following month.
It successfully detonated an atomic explosion and dropped two atomic bombs on Hiroshima and Nagasaki.
The correct option is true.