Answer:
C
Explanation:
the reason I choose C is because during a presentation you talking no one is reading do too keep your audience engaged in wht u saying it's good to have a video clip preferably a clip with pictures and helpfull information to your audience
Probably a survey or a questionnaire on a group of random people so as to sample them. In that way you could cover a large number of people unlike using interviews that are time consuming and can only gather info from a few persons.
I believe the answer is D - third person limited