Detailed Instructions: In this task, you will be presented with a text, a pronoun from the text, and two candidate names. You should determine what the pronoun refers to and classify the answers into A, B, or Neither. A and B here are referring to option A and option B. Position of the pronoun in the text is showed within two "_"s.
Problem:Attack on Titan is a Japanese manga series written and illustrated by Hajime Isayama. Set in a world where humanity lives inside cities surrounded by enormous walls due to the Titans, gigantic humanoid creatures who devour humans seemingly without reason, the story centers around Eren Yaeger, _his_ foster sister Mikasa Ackerman, and their friend Armin Arlert, whose lives are changed forever after the appearance of a Colossal Titan brings about the destruction of their home town and the death of Eren's mother. <sep>, Pronoun: his <sep>, A: Hajime Isayama <sep>, B: Armin Arlert
Solution:
Neither