I think it is because the answer choice "A" does not provide an explanation for why everything tasted sweet, leaving the reader wondering. D, however, gives an explanation.
“If you think about it, ballet is just another kind of language, except that you talk with your body instead of with your mouth.”
-Jessi, Jessi’s Secret Language
Because dance is such a powerful way to communicate where words are not needed.
The answer to the first part is the second to last one, And for the second question is the second one
Yes, I definitely sympathize with Pahom because he worked a lot in order to achieve his goals. I feel both admiration and pity for him because after working that hard and reached a stage where he could say he achieved his goals, he died. So although he succeeded, he did not have the chance to enjoy what he succeeded.