Joe is charming and manipulative. he views other people as objects to be exploited, and does not feel guilty when he hurts their feelings or takes advantage of them. joe likely has

Which of the following studies is linked most directly to the establishment of the national research act in 1974 and ultimately to the belmont report and federal regulations for human subject protection? a. the public health service tuskegee study of untreated syphilis in the negro male.b. stanford prison experiment (zimbardo).c. tearoom trade study (humphreys).d. the harvard t3 study.