Answer:
i don't really know about the answer I'm sorry i wasn't taught about it in school
The correct answer is sentence (5).
A sentence fragment means that it is only a part of a sentence; it is not complete. Given that it is incomplete, the fragment, aka subordinate/dependent sentence, has to be part of a larger, independent sentence, in order to make any sense. So if you combined sentence (5) with another one, it wouldn't be a fragment anymore.
Duplicity means deceitful so kinda like double-sided or a liar <span />
i think the answer is either A or B but i think its A.
no word is italicized in the sentence but imma give it my best guess and say its a italiziced phrase