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Answer:
abacus
Explanation:
Focus On. There is a long history detailing the invention of computing and calculating machines. The earliest recorded calculating device is the abacus. Used as a simple computing device for performing arithmetic, the abacus most likely appeared first in Babylonia (now Iraq) over 5000 years ago.
The correct answer is:
It allowed and encouraged the recruitment of blacks to be soldiers for the U
forces.
Explanation:
It allowed forces to recruit the black males in the Union for the army in that there were many black leaders who were also in favor of this so that there was a possible emancipation of the black population.
They could fight for their own race's right to be free and this would have also given them good monetary recompenses.
This meant that fighting in the war would have given them a better lifestyle after the war and a better life to look forward to.
