<span>Option D that is rafts once fulfilling useful purposes, but now used mainly for decoration is also to correct the comma splice. In option B and option C, no use of comma splice is done. In case of option A, the usage of word Even is not an appropriate choice and hence option D is the only option that is able to use Comma splice in a proper manner.</span>
Honestly, I think one of the reasons why they think that is because they're like "So you are mostly a girl but part boy. We don't care what you say you are we think you're a girl."