People began to domesticate animals and crops...
and as their tools became better they were able to grow crops and livestock
Make sure you are educated on the topic and then make sure to stand up and let your voice be heard.
Hopefully that helps...
President Jefferson because it was the manifest destiny<span />
Pretty sure its informational influence processes (B), because his opinion is more extreme due to the new information that was gathered. His opinion is reinforced to a specific side.... in this case, what he already believed.
I say the land ordinance of 1785