> The President of the Senate gets his office
> a. by election by the people.
> b. by election by the Senate.
> c. by appointment by the President.
The Vice President is the President of the Senate, but the duties are typically exercised (save the tie-breaking vote) by the President Pro Tempore of the Senate, a Senator chosen by whichever party currently has a majority. It seems both a. and b. could be considered correct.