A. It allowed Maine to enter the Union as a free state.
Explanation:
In an effort to preserve the balance of power in Congress between slave and free states, the Missouri Compromise was passed in 1820 admitting Missouri as a slave state and Maine as a free state.
I am pretty sure it is A because now we do mot read newspapers and things we have things such as phones B,C, and D are incorrect because technology does not affect those
Get more into real life situations. For example something that will make this decade more interested. Instead of something for 1875 that everyone will get bored of.
