Q: 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.
Following his military service, Shapiro became Director of the Biological Laboratory, Arlington Chemical Co., Yonkers, New York and, in January 1952, was assigned as Assistant Director, Organic Research, US Vitamin Corp., Yonkers, New York. His work there drew attention from ``The Talk of the Town'' section of The New Yorker. The work for Shapiro's doctoral thesis, ``Reaction of Phenyl Biguanide with Esters and Related Compounds'', published in JACS in 1954, was performed at the Polytechnic Institute of Brooklyn and in the laboratories of the Arlington Chemical Co. and US Vitamin Corp. under the direction of Prof. Charles G. Overberger. _His_ work there led to the development of DBI. <sep>, Pronoun: His <sep>, A: Shapiro <sep>, B: Charles G. Overberger
A:
A