Slave codes affected enslaved people by
a. turning them into indentured servants.
b. protecting them from slaveholders.
c. keeping them powerless.
d. protecting them from the government.

Slave codes affected enslaved people by "c. keeping them powerless" since this is how the slave owners and white society in general kept them as unpaid servants. 

Its a government where there are no states so the federal government has supreme authority and no other government bodies can challenge it. england is an example of a unitary government. other types of governments are federal, like the united states, where the power is shared between state and federal government, and confederate, where the states hold all the power and the only government that bonds them all are on issues that all states agree on. the south during the civil war was a confederate government, as well as america when it was governed under the articles of confederation.