Answer: explore
Magellan did not conquer any land, so that option is not the answer. Convert does not fit in this sentence, so this option is not the answer. Circumstance does not fit in the sentence, so the answer must be explore.
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The best option would be the <span>C) increased used of electrical appliances.
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The Tang Empire was very economically successful, it was one of the greatest empires in the medieval world. It was strong, had diplomatic relations and had a cultural efflorescence of cosmopolitanism. Many other people from different cultures and countries also travelled to China in the streets of Chang’an.