In an interview, the person who interviews is called the interviewer, and the person being interviewed is the interviewee (this is similar to the employer and the employee).
In this experiment, the only person being interviewed was <span>Marielle Tsukamoto so she is the only interviewee.
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The answer would be A: A labeled diagram of a car engine. This would show the viewers what each part is and where it goes in order to rebuild the engine.