Of the many people what she interviewed; she chose the one with the most experience.

In the given sentence, the word "what" is used incorrectly as it functions as a determiner when it should be a relative pronoun. The phrase "Of the many people what she interviewed" is awkward and does not convey the intended meaning clearly. To correct the sentence, the relative pronoun "that" or "whom" should be used instead of "what."

The correct form would be "Of the many people that she interviewed," which properly introduces the clause describing the people. "That" correctly connects the clause to the noun "people," indicating which specific individuals are being referred to. This ensures clarity and grammatical accuracy in the sentence.

Thus, focusing on "what," the context shows that a replacement with the appropriate relative pronoun is necessary to maintain the sentence's grammatical structure and meaning.