Dr Little Has Heard That People Tend to Become More

Dr. Little has heard that people tend to become more politically conservative as they get older. She decides to conduct a study to see if this is true. She conducts a telephone survey where she asks participants their age and political affiliation. She then uses
Statistics to see whether there is a relationship between these two variables. Which of the following research designs best describes Dr. Little's research?

A) correlational research
B) representational research
C) naturalistic observation
D) experimental research