Cause-And-Effect Conclusions Can Be Drawn from the Results of an Experiment

Multiple Choice

Cause-and-effect conclusions can be drawn from the results of an experiment because:

A) it is almost always performed in a laboratory setting.
B) statistical analysis can be applied to data from an experiment.
C) the independent variable is manipulated while other possible causes of change in the dependent variable are held constant.
D) several groups of subjects,not just one sample,are typically investigated in a laboratory experiment.