Which of these would be seen as the LEAST likely threat to Africa's water supply

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.

When were criminals first used to create a system to catch other criminals

Government run farms are known as a. pastoral b. collectives c. irrigation d. dalits