Answer:
A Tariff
Explanation:
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<span>A decline in trade is the economic theory given for the fall of the Indus Valley civilization </span>
I think the correct answer from the choices listed above is option B. A major cause of European exploration would be the <span>desire for direct access to spice's. Since during their time, spices are very important and are also indicators of how rich a country is. Hope this answers the question.</span>
