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.

This was an era of significant change at Mount Stromlo: in January 1956 Woolley had resigned as director of Mount Stromlo to take up a position as Astronomer Royal and director of the Royal Observatory Greenwich. He was replaced by Bart Bok, whom Gascoigne liked and under whose directorship _he_played a significant role. <sep>, Pronoun: he <sep>, A: Bart Bok <sep>, B: Gascoigne
B