The plantation economy in the South produced "<span>B. great profits at the expense of cultural development and equal opportunity," since it was maintained mostly by slave labor. </span>
Answer: Following the assassination of Franz Ferdinand, Austria Hungary was hella mad about it, so they went to Germany, and was like hey, help us get revenge on Serbia. So the two of them teamed up and declared war on Serbia on July 28th. Shortly after (a couple of days) Germany declares war on Russia, and then after Serbia's ally invaded France, that pushed Great Britain to declare war on Germany.
(hope this helps)
The answer is A. Demoralizing the North with a victory on northern soil.