Answer:
The concern over succession ( C )
Step-by-step explanation:
All the other factors like contributed to the presidential selection system we use today except the concern for succession which is mostly applicable in Monarchical system of government been practiced in some parts of the world.
The 12th amendment : provided the process for electing the president and vice president replacing the provisions made in Article 11 section 1 clause 3
Also the elections of 1800 also contributed to how presidents and vice presidents would be elected moving forward