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.

Barnum moved up to the Division I level in 1991 as assistant offensive line coach and freshman offensive coordinator at Cornell, where he would remain for two seasons under Jim Hofher. In 1993, Barnum returned to the Division II level as offensive line coach and run game coordinator at American International College. Barnum then coached at the Division III level, at Coast Guard as offensive line coach and assistant head coach from 1994 to 1997. After _his_ stint at Coast Guard, Barnum returned to the Division I level at Idaho State and started as offensive line coach in 1998 under Tom Walsh. <sep>, Pronoun: his <sep>, A: Barnum <sep>, B: Tom Walsh
A