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Uses of chlorofluorocarbons (CFCs) include all EXCEPT which of the following?
Keyboard Design
The arrangement and layout of keys in a keyboard, which includes considerations of ergonomics, usability, and efficiency for typing.
Placebo Effect
The phenomenon in which the expectations of the participants in a study can influence their behavior.
Subject Bias
Preconceived notions or attitudes exhibited by subjects in a study, potentially affecting the validity of the research or experiment outcomes.
Independent Variable
A variable in an experiment that is manipulated or changed by the researcher to investigate its effect on the dependent variable.
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