Which of the following statements describes the use of the Field Extractor (FX)?

Which of the following statements describes the use of the Field Extractor (FX)?
A . The Field Extractor automatically extracts all fields at search time.
B . The Field Extractor uses PERL to extract fields from the raw events.
C . Fields extracted using the Field Extractor persist as knowledge objects.
D . Fields extracted using the Field Extractor do not persist and must be defined for each search.

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Answer: D