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.

Johnson was born in Mendota, Illinois, to George C. Johnson, a successful farmer, and his wife, Hanna. She attended Saint Mary's College in South Bend, Indiana, from 1882 to 1884, graduating at the top of her class. Afterward, she worked as a teacher, but found it unfulfilling. While spending the summer with _her_ sister, Mary Walker, in Monroe City, Missouri, in 1890, Johnson answered a newspaper ad for an assistant at Rippey's photography studio. <sep>, Pronoun: her <sep>, A: Mary Walker <sep>, B: Johnson
B