"<span>C) In order to prevent misconstruction or abuse of its powers, that further declaratory and restrictive clauses should be added" would be the best option, assuming you're referring to the Bill of Rights, since this was added to ensure that the new government wasn't too powerful
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The best and most accurate answers to identify the two factors that had the most influence during the 1960's presidential elections was foreign policy and civil rights (second choice).
Hope my answer was able to satisfy your query. Have a nice day.
Two sources of the Nile are Lake Victoria and Lake Tana.