Answer:
d.china/ huang he river valley
Explanation:
Constructed giant stone monuments.
As Jeffrey and Dorcas are slaves they cannot choose their destiny. When Jeffrey is bought he begs his master to buy Dorcas and he agress to do so as long as the price is resoanable, the next day Dorcas is put to be sold but, unfortunately, her wholefamily has to go with her, therefore Jeffrey's master gives up on buying Dorcas, sothey go their separate ways.
I think that would be the Great Depression? I’m not 100% sure but I think this is it.