Answer:
I believe the answer is C, Olmec.
Explanation:
I would say b. precious stones Example of commodities that have been used as mediums of exchange include gold, silver, copper, salt, peppercorns, tea, large stones (such as Rai stones), decorated belts, shells, alcohol, cigarettes, cannabis, candy, cocoa beans, cowries and barley.
I believe it is B, but I know for sure it is not A, I can try and leave some links for you to get more info on it
It was the "Oregon Train" that brought settlers to the Willamette Valley, sine although there were other smaller trails in the region, this was the most traveled by those wanting to start new lives and businesses in the region.
How many license plates can be made which have the form ##LLL ?
1,757,600 :: 10^2 * 26^3
