The data could be used to support which conclusion? A. Gulf Coast states had to rely on steamboats to transport goods
B. States in the lower South had more land devoted to plantations
C. Border states had to import needed raw materials
D. States in the upper South were heavily industrialized ​

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.

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.

i would say b. research typically uses a variety of sources