Which of the following is true of the use of an A-bomb on Hiroshima on August 6, 1945?
A. The bombing of Kyoto was meant to be first, but bad weather over the flight zone moved the target to Hiroshima.
B. The bomb only used a small fraction of its potential explosive force.
C. The Army Air Corps was careful to drop the weapon over a specifically military target, not the city's civilian center.
D. The bombing was postponed several times, due to technical issues with the bomb and uncertainty as to whether or not it would work.