Which illustrates the use of control in experimentation?

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All the options listed illustrate the use of control in experimentation. Random assignment ensures that participants have an equal chance of being in either the experimental or control group, minimizing the impact of extraneous variables. A placebo group is included to control for the placebo effect and ensure that any observed effects are due to the independent variable and not a participant's belief in the treatment. The double-blind procedure helps to eliminate bias in both the researcher and the participants, ensuring that neither knows which group they are in.

Which Illustrates the Use of Control in Experimentation