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What was the significance other than the obvious harm to us forces of the terror attack on the uss cole in 2000

All of the following were weaknesses of the articles of confederation, except: a) the central government was not permitted to regulate state, interstate, or foreign trade. b) the central government was not permitted to borrow money. c) the central government had little ability to regulate money. d) the central government had no ability to tax.

Who were the people that migrated south into india and indus valley