SAT Question a20b7511: Words In Context answer and explanation

English - Words In Context - Fill In Blank Single Word
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Scholars long thought that the initial spread of silk beyond China occurred in the second century CE, but this view has been ______ by new archaeological evidence from South Asia that reveals that the people of the Indus Civilization made use of silk at least 1,000 years earlier.
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Difficulty:Easy
Which choice completes the text with the most logical and precise word or phrase?