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 also taught at Tokyo Imperial University. Ume was sent by the government for advanced studies to the University of Lyon in France in 1889, and after receiving a doctorate of law in 1891, he studied for an additional year at the Humboldt University of Berlin in Germany. On _his_ return, Ume became embroiled in the Civil Code controversy, and urged the immediate adoption of the code as drawn up by French foreign advisor to the government, Gustave Emile Boissonade. <sep>, Pronoun: his <sep>, A: Ume <sep>, B: Gustave Emile Boissonade
A