Why did president polk send troops to the border of mexico

What is one reason the united states had a two party system

Which events are correlated but do not necessarily have a causal relationship?

Select the correct answer from each drop-down menu. different sources are aimed at different audiences. sometimes a source can be directed at more than a single group of usually aimed at the general population across the globe. some sources may have a very specific audience. be specifically aimed at students or scholars with a background in literature.