In a scientific experiment, an experimental group is a group that is exposed to the INDEPENDENT variable to test how the DEPENDENT variable responds. Thus, it's A.
In scientific research, variables may be characterized as a person, place, thing, or spectacle that you are endeavoring to calculate in some way.
The independent variable is the root cause of any scientific research, while the dependent variable is the effect that may be changed as per the independent variable.
Therefore, the correct option is A.
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