*/*_Select the correct range of density index,1D?

1.	/_Select the correct range of density index,1D?
A.	1D > 0
B.	ID > 0
C.	0 < 1D < 1
D.	0 ‚Äö√¢¬ß 1D ‚Äö√¢¬ß 1
Answer» E.

Discussion