Definition: 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.
Input: John Jackson (1801-1848) was an English engraver. Jackson was born at Ovingham, Northumberland in 1801, and was apprenticed to the wood engraver Thomas Bewick. After a quarrel with _his_ master, Jackson went to London and worked for the wood engraver William Harvey. <sep>, Pronoun: his <sep>, A: Jackson <sep>, B: Thomas Bewick

A