What happened to the Loyalists?

The bishnoi conservationist is take care of nature and grow with it, instead of exploiting it explain the statement

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.

What is the one of the two issues involving slavery in the constitution