I believe the answer is A but i could be wrong, during the Civil war it made it easier for them to speak and talk to each other during that time sending goods and messages across the united states.
Hope this helps.
The country that refused was France
The Republican party began as a coalition of anti-slavery "Conscience Whigs<span>" and </span>Free Soil Democrats<span> opposed to the </span>Kansas–Nebraska Act<span>, submitted to Congress by </span>Stephen Douglas<span> in January 1854.</span>
