Answer:
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Explanation:
One current theory is that trade with Mesopotamia (which was very important to the Indus Valley civilization) slowed or stopped, due to Mesopotamia's own troubles at the time.
Unlike the fallen Western province of the Roman empire, Justinian and Theodora developed a centralized government where all power and decision-making was concentrated in one unit instead of having power in the hands of many different people in different locations.
Definitely B.) Alaska I hope this Helps