One negative effect of interest groups is that politicians today cater to the wants and needs of interest groups instead of to the needs of the public. This effect is called

experiments.

surveys.

questionnaires.

interviews.

case studies.

participant and non-participant observation.

observational trials.

studies using the delphi method.

answer; the above statement is (true);

answer; /// the above statement is (true);

answer; software failure, and human error;