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.
the answer was d and do it well
I believe it is B - It provides momentum throughout the poem.
(please let me know if I am wrong, also I apologize in advanced just in case it is wrong.)