Your answer is going to be C.
The element that is most likely to be featured in a work of realistic fiction is "well-defined character suggested by actual experience." This would provide the most realistic character.
i believe it is a sentence fragment and subject verb disagreement
Parallel Element = 'not morose, misanthropic, and revengeful, but cheerful, hopeful, and forgiving,'
This sentence follows the same gramatical structure of using two words with a comma and then ending the rule of three with an and. These complex entence is also seperated through by rude of the conjuction of but.
