Which ICAO flight plan item designator is used to indicate that a flight will operate under both IFR and VFR rules (composite flight)?
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A
Item 8 coded as 'Z'
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B
Item 15 with 'VFR' inserted at the change point
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C
Item 18 with 'COMP/' prefix
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D
Item 8 coded as 'Y' or 'Z' with Item 15 specifying the change point