Atlantis sank into the sea just as WTC fell into Manhatten
Gregor's actions likely displays how he clings to his humanity after his transformation. I might not be right, but this is what I think is what his actions symbolize.
D is the answer I believe it seems correct
The answer is "she" -- which was "heo" in Old English. (He, me, and we have all been relatively unchanged since the time of Old English.)