im not sure of the answer but i know that it is not B. but my guess would be C.
The war was centered in the east, and as military power grew it was often used to oppress, so many people fled west to the U.S. for freedom.
Panning like during the gold rush
Atoms usually engage in chemical reactions which will end in complete outer electron shells. Most of the time, a complete outer shell usually means 8 electrons, except for a couple light elements which only require 2 electrons to have a whole outer shell.
Erosion because erosion is when rocks are being broken down
