A roll-off of 20 dB per decade is equivalent to a roll-off of ________ per octave.

A roll-off of 20 dB per decade is equivalent to a roll-off of ________

1.	A roll-off of 20 dB per decade is equivalent to a roll-off of ________ per octave.
A.	3 dB
B.	13 dB
C.	12 dB
D.	6 dB
Answer» E.