African American played important roles for both sides during the war. Which statement is not true? a.
African Americans served as members of the Union army.
b.
Slaves worked in the military camps of the Confederate army.
c.
Slaves served as soldiers in the Confederate army.
d.
African Americans served as spies and guides for the Union.

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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.

answer; /// decreasing responsiveness to a stimulus to which one is repeatedly exposed;