How did democratic reforms, technological innovations and scientific advancements impact western society during the 19th century?

Which scenario best illustrates the principle of popular sovereignty?

Which of the following is not a requirement to become a us representative (congressman/congresswoman)? a.be at least 25 years old b.have been a citizen of the united states for the past seven years c.be (at the time of the election) an inhabitant of the state they represent. d.hold a college degree

Who was the first explorer to sail all the way down the mississippi river