I know for a fact that the answer is B, Arab Traders
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Answer:
A cannot be accurately measured
It allows people from multiple countries to connect at once while playing an online game.
Answer:
Deep within the Earth it is so hot that some rocks slowly melt and become a thick flowing substance called magma. Since it is lighter than the solid rock around it, magma rises and collects in magma chambers. Eventually, some of the magma pushes through vents and fissures to the Earth's surface.
Explanation: