What became the main labor source in the southern colonies?
a. african slaves
b. english colonists
c. indentured servants
d. native americans

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;

in 1859, brown and 21 of his followers attacked and occupied the federal arsenal in harper's ferry. their goal was to capture supplies and use them to arm a slave rebellion. brown was captured during the raid and later hanged, but not before becoming an anti-slavery icon. abolitionist and insurrectionist

explanation:

nations must cooperate to bring about and maintain world peace.

nations must not wage wars or commit war crimes in a desire to control other nations.

i think i know which options you have but if these aren't options let me know