Assuming you had to choose between:
- <em>Democratic Primary Election</em>
- <em>Iowa Caucus</em>
- <em>Democratic National Convention</em>
- <em>None of the above</em>
The answer is: the Democratic Primary Election.
You could also add the Democratic National Convention, but only pledged delegates get to vote for their Presidential nominee (+ Vice President) in these elections, and not all citizens.
In the case of the Democratic Primary Election, however, all citizens vote for the candidate they want to run as a Democrat in the general election. Winning candidates then send their nominees to the Democratic National Convention.
B. That Americans had the right to spread and take land
<span>Japanese rulers had internal problems due to the nature that the majority of them were influenced by those outside the position such as advisers often for their own gain. Political intrigue by rival families that lead their own armies like Tokugawa Ieyasu also caused internal strife.</span>