Answer: C. by influencing President Truman's decision to drop the atomic bomb on Japan
Step-by-step explanation: President Truman on august 06, 1945 dropped the world's first first atomic bomb named "Little Boy" on the Japanese city of Hiroshima, Three days later another bomb was dropped but this time in the city of Nagasaki. This was the reason Japan surrendered and in result the World War II was over.