The correct answer to this open question is the following.
Although there are no options provided, we can say the following.
A statement of basic principles and positions on various public policy issues put forth by a national political party worked on at every national party convention level which is adopted by its candidates in the election campaign, is known as the party platform.
The party platform is of the utmost importance because it is going to define the goals of the party and include the mission, vision, and values of that political party.
If a US citizen wants to learn more about the Republican Party or the Democratic Party, or any Third Party, it has to read the platform to learn more about the party's beliefs, idiosyncrasy, tenents, and goals.
It is very important that US citizens get familiar with the platforms to make the right choice during elections, and not only vote for the best candidate due to its public image and marketing campaign.