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The positive and negative terminals of a 9 volt battery are about 1 cm apart. If...

The positive and negative terminals of a 9 volt battery are about 1 cm apart. If proton is released at rest from the positive terminal of a 9 V battery, how much kinetic energy does it have just before it strikes the negative of the battery?

A. None, it's kinetic energy has been used up.
B. 6.8 x 10-27 J
C. 9.0 eV
D. 1.4 * 1020 J
E. 1.4 * 1022 J

I think there could be two answers, I thought it was 9.0 eV.

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