Which statements about infrared communication are true?

A.
IrDA compliant devices are designed to operate at a minimum distance of 1 meter

B.
Transceivers are designed to operate best in a reflective environment

C.
Very Fast Infrared (VFIR) and 802.11 compliant infrared share the same data rate

D.
The range of an 802.11 compliant infrared device is approximately 20 meters