Given the task definition and input, reply with output. 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.

Next year, Cao Ren followed Cao Cao to attack Zhang Xiu, and was authorized to lead a separate command to raid the counties around, where he hijacked and enslaved several thousand residents. Zhang feigned surrender upon Cao Cao's arrival outside Wan, and attacked _his_ camp one night. <sep>, Pronoun: his <sep>, A: Zhang <sep>, B: Cao Cao
B