The correct option is Radio frequency identification technology (RFID).

Radio frequency identification technology (RFID) enables contactless tap interactions because the badge contains a small chip and antenna that communicate with a reader using radio waves. This allows the reader to identify the card at short range without direct line of sight and it supports secure identifiers and access control functions that make it the appropriate technology for staff ID badges used for building entry and transactions.

Barcode technology is incorrect because barcodes require an optical scanner and direct line of sight and they are not used for tap style badge reads.

Optical character recognition is incorrect because OCR is a method for extracting printed characters from images and it is not a contactless badge communication technology.

Magnetic stripe technology is incorrect because magnetic stripes require physical swiping or close contact and they are more prone to wear and skimming. They are not the typical method for tap or contactless access in modern badge systems.

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