Which title best completes the diagram?
a. effects of open door trade
b. goals of the sherman antitrust act
c. policies of the interstate commerce act
d. problems addressed by the square deal

can you give a picture of the map, i'll be able to update my answer!

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place.