A Key Difference Between Radio Frequency Identification (RFID) Technology and Bar

A key difference between radio frequency identification (RFID) technology and bar code technology in the inventory valuation process is that:

A) bar code technology requires the placement of transponder tags on all products received from suppliers.
B) RFID uses hand­held wireless scanning equipment for inventory counting.
C) bar code equipment is based on a weight­per­unit concept of inventory counting.
D) RFID eliminates the need for line­of­sight reading.