Answer: Answer is B. Trans-Saharan was just land and they tried sea but I believe they failed. Silk Route was land and Sea, since for Asian countries sea was more accessible. Hope this helps, just learned this last year.
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i dont have enough time to write 150 words, but you can write about the fiction of Healing robots or medicine. People are starting to invent tiny chip like things that go in the bodies of people or maybe a flying motor cycle i think its been made already just stuff like that
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