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.

Let me give you an example: 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
The answer to this example can be: A
Here is why: Based on the text, his refers to MacKenzie so option A is correct.

OK. solve this:
Acosta was born in 1825 to Magdalena Santa Coloma Lezica, the daughter of a prominent Buenos Aires Province landowner, and Jos* Francisco Acosta, from Corrientes Province. Opposed to the repressive regime of Governor Juan Manuel de Rosas, Acosta emigrated to Europe shortly after _his_ secondary school graduation. <sep>, Pronoun: his <sep>, A: Juan Manuel de Rosas <sep>, B: Acosta
Answer:
B