<span>The Romans' first code of law was called The Law of the Twelve Tables, instituted in the time of the emperor named Justinius and established around 200 B.C. The law dealt with property rights and punishment for criminals. The Roman's first code of law did not deal with elections or trade agreements.</span>
I suppose the C is right, because at that time,Spain and Portugal take advantage of slave and cane to be rich, they buy the black people from African to plant sugar cane.
Class struggle and political revolution is necessary for socialism to emerge. They think that everyone will just adopt it, without struggle or a fight, if it's represented convincingly.
Push factors include war, famine, descrimination ect. in the native country of the migrant eg Irish people were pushed to emigrate to america and england during the Great Hunger (1845-1849)
pull factors include the promise of good job opportunities in america, hot climate, ect