Your answer would be D: restatement because the beginning of the sentence says, "Brandon continuously flaunted his good luck." Later on, the sentence says, "...of his sister by bragging..." Bragging and flaunted are synonyms, but repeat. The sentence could say " Brandon continuously flaunted his good luck in front of his sister as he handed her a tissue for her watery eyes and stuffy nose. So, it is a restatement.
I hope this helps, but I recommend talking to your teacher because it could be A or D, because bragging and flaunted are synonyms, but it is unnecessary repetition. :)