Which D2D Tape Library Emulation type is preferred because it is clearly identifiable as a D2D devic

Which D2D Tape Library Emulation type is preferred because it is clearly identifiable as a D2D device
if supported by your backup software vendor?

A.
D2DEML Generic Library

B.
ESL E Series Library

C.
MSL G3 Series Library

D.
D2DBS Generic Library