Someone please helpps this is like 6th grade stud man

What was the social class pyramid during the civil war?

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.

Epicureanism advocated reason and duty. select the best answer from the choices provided t f