Slavery in the roman empire was select one: a. based on race. b. unproductive in the long term because it gave little incentive for hard work. c. a factor leading to technological innovation in agriculture, because slaves were so expensive. d. confined to workers in agriculture. e. responsible for the overpopulation of the empire.

answer:

i think   the answer will be b i hope this

explanation:

in the 1950s, country music came into its own before rock-n-roll took off in the 60s while jazz and classical music continued to innovate

the federal constitution of the united mexican states of 1824 was enacted on october 4 of 1824, after the overthrow of the mexican empire of agustin de iturbide. in the new constitution, the republic took the name of of united mexican states. it was replaced by the federal constitution of the united mexican states in 1857.