Final answer:
The correct answer is c) Experimental condition, which is when participants in an experiment are exposed to the treatment or one version of the independent variable.
Step-by-step explanation:
The condition of an experiment that exposes participants to the treatment, or to one version of the independent variable, is known as the experimental condition. This is distinct from the control group, which does not receive the experimental manipulation. In a well-designed experiment, the independent variable is the factor that is changed or controlled by the researcher to study its effect on the dependent variable. The dependent variable, on the other hand, is what the researcher measures in an experiment to see the impact of the independent variable. Therefore, the correct answer to the student's question is c) Experimental condition.