Which mineral is mined in the Williamson mines(A: DIAMOND, B:COPPER, C: PHOSPHATES, D: GOLD)?
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The length of the path between two points is what

Which are results of technological advances? increased people's exposure to new ideas created a global culture valued by people around the world brought harmony to diverse groups of people reduced the number of people living in rural areas

Distance that the transcontinental railroad covered from omaha to san francisco.