The missing character is J.
The sequence is a list of letters that are two places apart in the alphabet, starting with A. The next letter in the sequence is J, which is two places after B.
A. D is not the missing character because it is not two places after B in the alphabet. B. F is not the missing character because it is not two places after B in the alphabet. C. J is the missing character because it is two places after B in the alphabet. D. N is not the missing character because it is not two places after B in the alphabet.