Can some one help me with this question its hard :( down below ill give brainliest

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.

Why learning about people and places around is important?

Which phrase in the preamble of the constitution means the government should provide peace and order in society.