Answer:
C) A process of determining presidential succession is the correct answer.
Explanation:
The twenty-fifth amendment of the US constitution states that if a president is unable to continue his job then vice president should take over. IT can happen if a president is out of the office due to illness, death, resignation or some other reason. It also states that what should happen if there is vacancy for the Vice president. It became part of US constitution on 10th February, 1967.