Answer: Nominal level is the operating level at which an electronic signal processing device is designed to operate. ... It is important to realize that the measured level is a time average, meaning that the peaks of audio signals regularly exceed the measured average level.
Explanation:
Acoustic instruments.
Simple chord progressions such as C-F-G or Am-G.
Simple time signatures such as 3/4 or 4/4.
"Sharp" or natural keys such as C, D, E, G or A.
Simple scales such as pentatonic minor (blues), pentatonic major, major, melodic minor and mixolydian.
I think that the answer is C.
