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.

He enjoys teasing lifelong friend Burton Guster (Gus), a pharmaceutical representative, about Gus's eclectic interests as they drive around in a blue Toyota Echo nicknamed ''The Blueberry'' solving crimes. Head detective Carlton Lassiter (Timothy Omundson), playfully named ''Lassie'' by Shawn and Gus, quietly respects Shawn's crime-solving skills, but doubts _his_ psychic abilities and is constantly exasperated and/or infuriated by his antics. <sep>, Pronoun: his <sep>, A: Gus <sep>, B: Shawn
B