Final answer:
The 12th Amendment is the best title for the list as it introduced key changes to the presidential election process.
Step-by-step explanation:
The BEST title for the list is the 12th Amendment. The 12th Amendment replaced Article II, Section I, Clause 3 of the United States Constitution and made significant changes to the presidential election process. It established a separate ballot for the President and the Vice President, ensured that the President's running mate would be their Vice President, and required the Vice President-elect to be constitutionally eligible for the office of President.
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