If a Researcher Tries to Establish a Cause-And-Effect Relationship by Systematically

Multiple Choice

If a researcher tries to establish a cause-and-effect relationship by systematically manipulating one factor, the independent variable, in a tightly controlled situation to learn its effect on another factor, the dependent variable, he or she is conducting a(n) :

A) survey.
B) experiment.
C) textual analysis.
D) All of the answers are correct.