What two descriptions best define DWDM? (Choose two)

A.
a WDM system that is compatible with EDFA technology

B.
an optical technology for transmitting up to 16 channels over multiple fiber strands

C.
an optical technology for transmitting up to 32 channels over multiple fiber strands

D.
a technology for transmitting multiple optical signals using less sophisticated transceiver design
then CWDM

E.
a technology for transmitting more closely packed optical signals using more sophisticated
transceiver designs than CWDM