_ 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.

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