They needed to keep their slaves otherwise it would have put them in serious debt and they would need to do the work themselves which was a lot due to the south was the biggest cotton producer in the world but, the north didn't want them to have slaves.
Answer:
b: lighting the national christmas tree
The main reason why many European explorers continued to look for routes to Asia
<span><span>is because traveling over land between Europe and Asia was extremely time-consuming and expensive, meaning that a Sea route would make trade far more profitable. </span></span>
