It was called isolationism :D
It is letter C because plantations were farms that encouraged slavery
Hey there Sam,
Your correct answer to this question would be <span>
The value of imports and exports increased steadily. The reason on why I say this would be A.) is because you can see in the graph that the graph obviously moved up. It did not go down. It actually progressed. I Hope this helps you.
Your clarified answer would be
</span><span>
The value of imports and exports increased steadily.
Hope this helps.
~Jurgen</span>