Hydrogen has three isotopes, 1H, 2H, and 3H. What is the difference between these three isotopes?
A. The number of protons ranges from 1 to 3.
B. The number of electrons ranges from 1 to 3.
C. The number of neutrons ranges from 0 to 2.
D. The number of protons ranges from 0 to 2.

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