Which of the Following Is True About a Field Study

Which of the following is true about a field study?

A) A field study is an in-depth analysis of a single individual, group, or organization.
B) A field study is a statistical pooling technique that permits behavioral scientists to draw general conclusions about certain variables from many different studies.
C) In a field study, samples of people from specified populations respond to questionnaires.
D) A field study probes individual or group processes in an organizational setting, involving real-life situations.
E) In a field study, variables are manipulated and measured in contrived situations.