I'd say logic and reason. I hope this helps you :)
The answer is psychoacoustics in which it is the study of the psychological associates the physical measurements of acoustics and it is a branch of psychophysics. In addition to perception, audibility threshold is the lowermost sound pressure level that can be reliably noticed at a given frequency and temporal integration the procedure by which a sound at a constant level is alleged as being louder when it is of the greater period.
I believe the correct answer is D
Because everyone was at there best moments