In a command economy, how are the prices of goods and services determined?

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.

i think it was because of how protected egyptian civilization was was which allowed them to evolve without much outside influence.

the ansseer is going to be c i think