Final answer:
The Twelfth Amendment achieves its goal by changing the rules for the selection of the president and vice president. It created separate elections within the electoral college for each position, ensuring that the candidates are chosen by the voters.
Step-by-step explanation:
The Twelfth Amendment achieves its goal by changing the rules for the selection of the president and vice president.
Prior to the amendment, the electoral college would select two candidates - one for president and the runner-up for vice president.
This led to a flaw in the system, where individuals could end up with a vice-presidential running mate who they didn't agree with politically.
The amendment created separate elections for president and vice president within the electoral college, ensuring that the candidates for both positions are chosen by the voters.