The answer to this question is: <span>Read and sign an informed consent form
If there study caused some relatable negative effects to the subject of study, the participants could sue the researchers because technically the researcher is the one that create those effects.
But, if you mention the possible side effect and make the participants constantly join the study, you will be safe from potential alwsuit.</span>
Political is because In political science, a political system defines the process for making official government decisions. It is usually compared to the legal system, economic system, cultural system, and other social systems.
Liberal because it is on the left
Roman government is the answer