7. Which of the following was NOT a ruling of Scott v. Sanford? * a. An enslaved person could not become free by traveling to a free state or territory.
b. A free African-American was a citizen of the US.
c. An enslaved person was considered property and didn't have any rights.
d. Congress could not prevent the spread of slavery into the western territories.
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answer to ur question is college b

for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.