describe what Jefferson and jackson did as presidents do you see the current president s do the same kind of thing​

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.

How has our understanding of the first sentence of the declaration of independence changed over time?

Refers to the biological heritage people use to identify themselves.