An Example of Unobtrusive Data Collection Is

Multiple Choice

An example of unobtrusive data collection is

A) an interview with college freshmen to determine why they selected a particular school.
B) a laboratory experiment designed to determine whether people really prefer Pepsi or Coke.
C) a researcher examining files of students who completed college 25 years ago.
D) a researcher who joins a fraternity to understand its rituals.
E) a mailed survey designed to discern students' attitudes toward a planned change in the school's calendar..