To Guard Against Participant Expectations Biasing the Results of an Experiment,the

Multiple Choice

To guard against participant expectations biasing the results of an experiment,the experimenter may:

A) disclose to participants how earlier participants tested.
B) explain to the participant what the desired outcome should be.
C) try to disguise the true purpose of the experiment.
D) allow the participant to interact with people who have already been part of the experiment.