In research, what does an experiment group receive?

In research, an experimental group is designed to receive specific changes or interventions that are intended to test a hypothesis. This allows researchers to observe the effects of those changes and determine whether they result in a significant outcome compared to other groups, such as a control group.

This approach is fundamental in scientific experimentation because it helps establish cause-and-effect relationships by isolating the variable being tested. By manipulating one or more variables in the experimental group and keeping other conditions constant, researchers can draw conclusions about the impact of those specific changes on the subjects being studied.

This differentiates the experimental group from others, like a control group, which does not receive the experimental treatment or may receive a placebo. Thus, option C clearly captures the essential role of the experimental group within the broader context of hypothesis testing in research.