Which piece of textual evidence best supports the main character's dual existence? a. ". . but those games belong to borges now and i shall have to imagine other things." b. "it is no effort for me to confess that he has achieved some valid pages . ." c. "i shall remain in borges, not in myself (if it is true that i am someone), but i recognize myself less in his books than in many others or in the laborious strumming of a guitar." d. "besides, i am destined to perish, definitively . ."