Posted by sara on Friday, December 10, 2010 at 4:23pm.
The productivity certainly increased in that century. Farmers went from plowing with horses or oxen and steel plows to using motorized tractors and other equipment.
However, I don't know if it doubled or quadrupled. I'm sure that information is in your text materials.
okay thanks I found it, it's C.
Thanks for posting the answer.
no problem!
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