If a fusion reaction produces no appreciable radioactive isotopes, why does a hydrogen bomb produce significant radioactive fallout?
A. The radioactive fallout is a result of the fission reaction used to ignite the thermonuclear fusion reaction.
B. It is a misconception that fusion reactions produce no appreciable radioactive isotopes. Therefore, radioactive fallout is unavoidable.
C. Once a hydrogen bomb is exploded, all matter within nearly 100 miles becomes radioactive fallout.
D. The fallout is only the radioactive remnants of the bomb's structure and casing.
Answer: A
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