Based on the graph, what conclusion can be drawn about the impact of the 19th Amendment? It led to near-total participation of registered voters in presidential elections.
It ensured that eligible citizens throughout the nation would be allowed to vote.
It brought about the largest percentage increase in voter participation in US history.
It completed the advance toward universal suffrage started by the 15th Amendment.

The 19th Amendment completed the advance toward universal suffrage started by the 15th Amendment.

Explanation:

The 19th Amendment to the Constitution was adopted by Congress on August 18, 1920.

This amendment introduced active suffrage for women. Thus, the long-term demands of the suffragists were satisfied. The amendment was written by Susan Anthony and Elizabeth Stanton and introduced to Congress in 1878. The amendment was only adopted in 1919, and then, a year later, it was ratified by the required number of states. In 1922, the amendment was challenged in the Supreme Court, which, however, unanimously rejected the claim and confirmed that the Nineteenth Amendment was part of the US Constitution. Therefore, suffrage was extended to both men and women in the United States, heading toward universal suffrage in America.

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation: