I think so because free trade
It said that as of January 1, 1863, all slaves in the rebellious states "shall be, thenceforward, and forever free." This was issued by Lincoln to preserve the nation into a battle for human freedom.
They investigated the incident of Watergate very heavily.
This was very problematic, as it seemed that Nixon was spying on other campaigns. The Watergate scandal marked an abuse of power, so it was important that Congress investigated this and kept his power in check
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Answer:a is the answer .......