The correct answer is this one:
B. preside
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over the Senate
In practice however, the vice-president is not very present in the Senate and he can only vote to break a tie.
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What comes with independence is the freedom to make your own decisions and do what you want without fear of restriction or consequences from some higher authority. If you make it clear to the world, you are declaring that no one can own you and tell you want to do or what rule you can follow.
I think it's c but I am not sure
