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.
Q: Zhang Tianxi ended the practice of using Emperor Min of Jin's era name Jianxing and instead started using the current era name of Jin Dynasty (at the time, Emperor Ai's Shengping), to show even greater affinity with Jin. In 363, Princess Dowager Ma died, and Zhang Xuanjing honored Lady Guo as princess dowager. _She_ became concerned that Zhang Tianxi was acting dictatorally, and she conspired with the high-level official Zhang Qin (**) to kill Zhang Tianxi, but the news leaked, and Zhang Qin and other conspirators were put to death. <sep>, Pronoun: She <sep>, A: Princess Dowager Ma <sep>, B: Lady Guo
A:
B