.B correct answer! Thanks!
Harappan Civilization's writing has never been decoded. Harappan Civilization is a part of the Indus Valley Civilization. The languages of the Harappan Civilization belong to the Bronze Age and they are still today a mystery. This language is totally unattested to any source that is readable. This is one mystery that is yet to be solved.
Answers:
1. A successful Union military action
2. <span>Free African Americans were allowed to enlist in the Union army and navy.
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D. Use money for paper trade.
