Roman civilization is associated with the Twelve Tables, an
extensive road system, and the poets Horace and Virgil. The twelve tables was
actually created in order to make a universal law for consistency. These tables
were actually created to protect a certain category of people like the plebeians
and patricians. These laws actually were made to protect the poor plebeians
from whom many rich people wanted to take away all the money. The road system
of the Roman Empire was also very extensively created for use of the Romans.
A. would be the correct answer
The Mexican American War (1846-1848) greatly affected the United States population and demographics. This is because this war resulted in the US gaining a significant amount of territory. This included states such as California, Arizona, New Mexico, and parts of places like Utah and Colorado.
All the citizens who lived in these territories were now considered part of America. This greatly increased the overall American population. Along with this, the amount of citizens with Mexican ancestry increased greatly as well. These territories would affect the population for years to come due to the fact that gold was discovered in California. This resulted in a huge increase in the amount of Americans moving to this state.
D. The right for people to decide for themselves (that's the "popular" part) without federal intervention.
For examples of how this didn't work as planned, see "Bleeding Kansas," Kansas-Nebraska Act, and much of the decade or so leading up to the start of the Civil War...