"The right of citizens of the United States, who are eighteen years of age or older, to vote shall not be denied or abridged by the United States or by any State on account of age."

Which of the following reflects the source and impact of this quote?

A. The 19th amendment protects the right to vote for all legal adults. Before this amendment, voters had to not only be an adult but also serve in the armed forces and be a high school graduate before they could vote.

B. The 26th amendment protects the right to vote for all legal adults. Before this amendment, young adults could be in college or even serving the military in combat but not be eligible to choose their leaders for a few years.

C. The 19th amendment prevents states from allowing minors to vote. Before this amendment, widespread voter fraud was an issue throughout the states, as parents would vote multiple times using their children's names.

D. The 26th amendment prevents states from allowing minors to vote. Before this amendment, candidates directed their campaigns at children and teens through cartoons rather than focusing on real political issues.

Which of the following methods could be considered a "best practice" in terms of informing respondents how their answers to an on-line survey about personal information will be protected? respondents are informed that investigators will try to keep their participation confidential; however, confidentiality cannot be assured. respondents are informed that a research assistant will transfer all the research data to a password-protected computer that is not connected to the internet, via a usb flashdrive. the computer is located in a research team member's office. the investigator uses the informed consent process to explain her institution's method for guaranteeing absolute confidentiality of research data. the investigator uses the informed consent process to explain how respondent data will be transmitted from the website to his encrypted database without ever recording respondents' ip addresses, but explains that on the internet confidentiality cannot be absolutely guaranteed. the investigator uses the informed consent process to explain how respondent data will be transmitted from the website to his encrypted database without ever recording respondents' ip addresses, but explains that on the internet confidentiality cannot be absolutely guaranteed