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 testimony. peer legitimate professional accurate expert?

The answer is: Expert

Expert testimony is a form of testimony that come from people who have deep knowledge and experience in a certain issue. This type of testimony usually regarded very highly in the court and has higher chance to  convince the juries to a certain opinion.

(examples of expert testimony are: testimony regarding fake internet account from IT experts, testimony about violent behavior from psychologists, etc)

where is your diagram?

answer; the best answer is (demand);