How did the cotton gin cause slavery to move west? ( write in your own words.)

What does this quotation from the introduction of thedeclaration of independence do?

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 would you call a political system that is only meant to last for a short time