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: Guadalcanal Diary was shot from May 14 to late July, 1943, mostly on location at Camp Pendleton, near Oceanside, California. Many of the Marines stationed there were filmed while on maneuvers and a substantial number appeared in the picture in small speaking parts or as extras. The picture marked the screen debuts of stage actor Robert Rose and Richard Jaeckel, who was a studio messenger boy when _he_was cast in the production. <sep>, Pronoun: he <sep>, A: Robert Rose <sep>, B: Richard Jaeckel

B