Answer:
d) public meetings where delegates from each state were given an opportunity to cast their votes for political candidates.
Step-by-step explanation:
In United States political culture, every four years there is a political convenction held (United States presidential nominating convention) by political parties who decide the candidate for the elections.
Beside deciding the candidate for the President of the United States, parties propose a platform which represent party principles and goals for the following period. Each party has a proportional number of representatives from each state, depending on the size of the state. These representatives are also known as delegates. Delegates cast their votes for candidate for the President, mostly following the popular vote held before the convention.
The two biggest parties Democratic and Republican Party have their convention every four years.