Can someone define supremacy clause for me

Reasoning based on the ease with which we can bring something to mind involves the use of the heuristic

The idea of a progressive income tax, which is still a standard taxing policy in the u.s. today, was aggressively sought by the populist party. select the best answer from the choices provided true or false

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.