The correct answer is D) more nations in the world began experimenting with atomic weapons.
The long-term effects of America's use of the atomic bomb in Japan? was that more nations in the world began experimenting with atomic weapons.
President Harry S. Truman ordered the launch of the nuclear bomb over Hiroshima on August 6, 1945. The bomb over Nagasaki was launched on August 9. After this, Japan surrender and Worl War II was over. After seen the destruction it caused, many nations started experimenting with atomic weapons. After the US, it was the Soviet Union that had its own nuclear bomb. During the Cold War years, both nations competed in the fabrications of weapons in what was known as the arms race.