I think your question means how did the discovery of gold contribute to the creation of the transcontinental railroad. There had been some movements toward westward settlement in the 1840s, but that trend accelerated dramatically with the discovery of gold in California. James Marshall's finding of gold at Sutter's Mill in California in 1848 led to a "gold rush" in the decade that followed, with 1849 seeing a huge influx of people to California. (Thus we refer to the '49ers.) The swift settlement of California added incentive to build a transcontinental railway. The Pacific Railroad Act of 1862 established the charter for doing that. The First Transcontinental Railroad was completed in 1869.
The correct answer is: "muckrackers".
Muckrackers were a generation of journalists who were active during the Progressive Era (between the 1890s and the 1920s), and who denounced for the first time, corrupt and abussive practices performed by companies and also by public officials in public institutions. They became highly influential as they used to publish their articles in popular magazines and newspapers.
The most Democratic aspect of a criminal trial is likely the jury process.
The jury process, unlike much of Judge led decision-making during trial, allows a group of the accused's peers to vote to determine whether they believe that the defendant is guilty of the crimes that they have been accused of in that trial. Majority decision-making is about as purely Democratic as it gets.
The correct answer is C. The candidate B won the popular vote in this elections, as he received 42.000 votes.
However, candidate A will eventually be the President, since she has more electoral votes, which are what define the position.
This hypothesis shows us that it can happen that the President is not the preferred candidate of the American people (it happened, for example, in the 2016 elections between Donald Trump and Hillary Clinton).