Which of the Following Statements Is True of Research Samples

Multiple Choice

Which of the following statements is true of research samples?

A) They must be chosen by the control group of the experiment.
B) They must be adaptive to the needs of the confederates used in research.
C) They must include the entire group about which the investigator wants to draw conclusions.
D) They must be representative of the population to which the investigator wants to generalize his or her results.