Civil Rights Act of 1866, African Americans enjoyed a period when they were allowed to vote, actively participate in the political process, acquire the land of former owners, seek their own employment, and use public accommodations.
The Persian wars began in 492 BCE and ended in 449. Alexander the Great conquered Persia in 331 BCE. The Peloponnesian War ended in 404 BCE. Trojan war was fought in 1100BCE. Therefore the answer is B.
It was because of the slavery that the traditional two party system fail in 1850's. Democrats were broken and in half over slavery and divided into North and South parties. Similar thing happened to the Wigs as many of their members went for the third party movements. One these movements would become the Republican party.
The Romans had conquered Greece. So, the Romans used many Greek ideas and incorporated it into their civilization.