The answer is A. also, No Tears Left To Cry comes out tonight ;)
<span>The speaker retells a story from Greek mythology, the rape of the girl Leda by the god Zeus, who had assumed the form of a swan. Leda felt a sudden blow, with the “great wings” of the swan still beating above her. Her thighs were caressed by “the dark webs,” and the nape of her neck was caught in his bill; he held “her helpless breast upon his breast.” </span>
The answer is: his. When it says neither, that means it talks about both of their carriages.