The atomic bomb had the most impact on modern life beacuse it ended World War II, ushered in the nuclear age and made the world safe for humanity.
C) Colombia had raised the price for the right to build the Panama Canal.
The United State's wanted to create a Canal somewhere in the Latin America Isthmus. Because of this, the US Congress adopted the Panama Canal plan, But Colombia was not willing to cut a reasonable deal since they were asking for too much money for control of the canal. This made president Roosevelt encourage Panamanians to rebel and support their cause.
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