Determine the appropriate resonance from the conjugate base
 

The anwer and explanation to this question is shown to the right of the attached image. I have no problem with the explanations of why choices A, B, and D cannot be the answer.
However I think there may be a typo in the third paragraph and that maybe choice C should be the answer instead of choice E, which has a carbon with 5 bonds, but no plus charge on it. Any advice?

This is a typo. None of those are resonance forms of para aminobenzoic acid. The structure of E should have single bonds to both the O- substituents. 5 co-ordinate carbon is (almost) always an absolute no-no because, if it is covalent, this requires 10 valence electrons around carbon.

Correct version attatched

Thanks
 

Thank you.