The correct answer is "It has an incorrect coordinate conjunction".
The way in which the word "while" is being used in this sentence creates confusion. When the word "while" is employed to tie together two events that are occuring at the same time, it's serving as a coordinating conjuction. However that's not the case in the sentence given. Here, the word "while" is being used incorrectly as a coordinating conjunction and showcases how negatively it affects the understanding of the excerpt.
Hope this helps!