Consider the following inheritance hierarchy diagram: 
Which of the following statements is correct?
Definitions:
Respondent
An individual who answers or responds to surveys, questionnaires, or legal matters, providing data or evidence.
Test Subject
An individual or entity used in experimental research to study effects or outcomes pertaining to various tests, treatments, or conditions.
Research Questions
Specific questions that guide a scientific or academic study, aiming to find answers or insights related to a particular topic.
Artificial Situation
A controlled environment or scenario often created in experiments or simulations to study behavior or responses under specific conditions.
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