If I knew the time period I could better answer your question but from what you have provided I would say that the correct answer is A or C. I hope this helps. :)
"Industrialization made more jobs in cities causing people to move there. which made the population rise."
or something like that.
Answer:
Low world prices for primary produce during the depression years from the 1870s to the mid-1890s certainly caused difficulties for Europeans trading to western Africa and led them to think that an increase in European control there would enable them to secure its produce more cheaply.
Explanation:
The "lost colony" was called Roanoke. The people in this colony mysteriously disappeared (dun dun duuun!) a few years after its establishment. It was established in 1589 in what is now North Carolina.
Hope this helps! Please let me know if I'm wrong :)