Which event directly led to Japan's surrender, effectively ending World War II in the Pacific?

Question

Question 6 options:

The Battle of Iwo Jima

The Doolittle Raid on Tokyo

The signing of the Potsdam Declaration

The dropping of atomic bombs on Hiroshima and Nagasaki

Answer 1

The event that directly led to Japan's surrender, effectively ending World War II in the Pacific, was the dropping of atomic bombs on Hiroshima and Nagasaki.