When julia wang quoted former u. s. social security commissioner dorcas hardy in her speech on reforming the social security system, she was using what your textbook calls:
a. legitimate
b. expert
c. peer
d. accurate
e. professional

b. expert

Explanation:

            Dorcas Ruth Hardy was a famous federal government former official. She was the Commissioner for Social Security Commissioner of the United States. She was also the first woman Commissioner to held the at post in the Social Security Commissioner.

            She was very dedicated and worked very hard to improve the the social and health conditions of the people. She was admired by many of the legislatures and union leaders across U.S. Julia Wang quoted her on her speech and said that she was an expert in her field. She is well known for her work in the United States.

Hence the correct option is (b).