Well, it would probably have to do with the research on our own opinions, so it would be A).
A. lol my teacher just told me.
All along<span> the the </span>west<span> and </span>south<span> coasts of </span>South America<span>, the </span>Andes<span> are a barrier to movement in interior. As a result, more </span>settlement<span> in </span>South America<span> has occurred </span>along<span> the eastern and northern coasts.</span>
<span>"C. Napoleon and his army established a revolutionary government in Rome"</span> is the best option from the list, but it should be noted that this was only a brief unification.