How are the duties of the Vice President determined? They are fully explained in the Constitution.

They are often decided by the President.

They are voted on by the public.

They are decided by the Vice President.

They are fully explained in the Constitution. Those duties are to succeed to the presidency upon the death or resignation of a president, a vice president's only constitutional duty is to preside over the Senate. Vice presidents cannot vote in the Senate, except to break a tie, nor may they formally address the Senate, except with the senators' permission.

However, the President can also give the Vice President additonal tasks, for example, being the head of the Coronavirus Task Force.

Explanation:

i beleive a. is the only possible answer