The speaker was able establish her credibility by referring to her consulting position and her college teaching experience.
What is credibility?
A credibility means a the quality of being trusted and being believed in.
How is credibility proved?
During interviews, applicant credibility can be ascertained through past records and position
Hence, she was able establish her credibility by referring to her consulting position and her college teaching experience.
Therefore, the Option C is correct.
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