You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

He grew up in Evanston, Illinois the second oldest of five children including his brothers, Fred and Gordon and sisters, Marge (Peppy) and Marilyn. His high school days were spent at New Trier High School in Winnetka, Illinois. MacKenzie studied with Bernard Leach from 1949 to 1952. _His_ simple, wheel-thrown functional pottery is heavily influenced by the oriental aesthetic of Shoji Hamada and Kanjiro Kawai. <sep>, Pronoun: His <sep>, A: MacKenzie <sep>, B: Bernard Leach
Solution: A
Why? Based on the text, his refers to MacKenzie so option A is correct.

New input: Barrett was not convinced that Roddenberry was going to leave his wife at the time, later explaining that he was troubled because he had made a promise to Eileen and took the commitment seriously. By the time he started on the series, Nichols said that they were only good friends as his involvement with Barrett continued. However, during the production of the first season, writer Ken Kolb entered Roddenberry's office to wish _him_ a happy birthday and found Nichols there, naked and under the desk, also waiting for Roddenberry. <sep>, Pronoun: him <sep>, A: Ken Kolb <sep>, B: Roddenberry
Solution:
B