Answer:
e. all of the above
Explanation:
This is true because, not only did the southerners began questioning the morality of slavery and its associated trading, they also vented their angers towards the northern abolitionists. The Northerners on the other-hand, wondered why the southerners were surprised with the idea that the slaves in question would rebel from their masters.
The answer is coal, hope this helped
Explain more........
I think you forgot to finish your sentence.
I think the answer to your question you ask is the letter b. the second to last.
One problem is by trading by sea, ships are bring invaise sea creatures to other countries and can harm the wild life for other marine ecosystems and for tons of people.
