A Group of Scientists Notices That People Who Smoke Often

Multiple Choice

A group of scientists notices that people who smoke often develop cancer later in life. To test this, they design a longitudinal study in which they take note of how many cigarettes each participant smokes each day, how many years each participant smokes, and whether he or she develops any kind of cancer at any point. What type of study is this?

A) an experimental study
B) a correlational study
C) a case study
D) a survey study