These descriptions of technologies are relative with short range wireless, which one is correct? ( )

A. Near-field communication enabling two electronic devices to communicate within a 4-meter range.
B. QR codes and barcodes is machine-readable optical tags that store information about the item to which they are embedded.
C. Wi-Fi Direct is the same with Wi-Fi standard but more easy to connect.
D. Radio-frequency identification use electromagnetic to read data stored in tags embedded in other items