What was the underlying factor behind the Nullification Crisis?

What was the main purpose of one of the first world organizations

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.

Which action would the president's political party most likely take to resolve this issue