Which of the following statements about RFID are TRUE?

Google Wallet uses an RFID$-$related technology called near field communication.

The cost of RFID tags used to be too high for widespread use, but now it starts at around $7$ cents per passive tag in the United States.

In inventory control and supply chain management, RFID systems capture and manage less detailed information about items in warehouses or in production than barcoding systems.

Passive RFID tags do not have their own power source and obtain their operating power from the radio frequency energy transmitted by the RFID reader.