Which of the following is an example of a tesis that a historian might write? a) in the year before the american civil war, there were nearly four million slaves in the united states. b) few people can agree on the true impacts of the american civil war. c) the american civil war saw northern u. s. states fight against southern states? d) the americans civil war was caused not by slavery but by economic factors

The correct answer is D) the American Civil War was caused not by slavery but by economic factors.

An example of a Tesis that a historian might right is "the American Civil War was caused not by slavery but by economic factors."

When writing a Tesis, a historian knows that he has to establish a good and proper hypothesis. So the topic "the American Civil War was caused not by slavery but by economic factors," is a good one because it reveals something different to what is the common beliefe and the historian has to prove it through his research and arguments.

they were unable to pay their debts

the east coast has nothing to do with the dust bowl, the dust bowl killed a full year's worth of crops in seconds, and with the dust on the land, the land would be worthless.   furthermore the farmers couldn't  get  out of their houses due to the dust so when the bank came to collect money, farmers couldn't  pay it

this isn't a question and if you're going to list things be kind and use commas.