I think it is "by foreshadowing what will happen"
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The title of Betty Friedan's book suggests that what women experience is a mystery that baffles the rest of society.
The answer is A. This is because it is a statically measured fact, rather than an opinion that could be altered by any sort of bias.
China.
The Silk Road is a trading route from the Middle East to China, and the ancient civilizaitons practiced ancestor worship. The Mandate of Heaven dictates that good weather and general prosperity are because of divine approval of the leader of China. If there is famine, invasion, or other natural disasters, it was interpreted as needing a new ruler, aka losing the mandate of heaven.