I guess it would be everything that they know is now what we know
The correct answer is D) Compromise.
Congress was constantly trying to find ways to "solve" the issue of slavery in American society. It first started with the Missouri Compromise. This established that the institution of slavery would not exist north of the 36'30 for any new states added during the era of westward expansion. However, this would not last forever as the adding of California after the Mexican-American War became a problem. This is because the 36'30 cut the state into two parts and the US did not want a half free half slave state.
This resulted in the creation of the Compromise of 1850. However, this law would not solve the issue of slavery. Rather, it just pushed the problem further down the road.
In ancient Sparta strength was admired and weakness was despised. The greatest virtue was bravery and the greatest honor was to die fighting in battle. The most serious crime for a Spartan was to retreat from battle.
They could get to know each other without supervision.
and
They had a cheap fast mode of transportation to go to places and to get to school, home and work without the expense of a car.