D is the conflict of the play.
The microphone, computer unit, headphone, studio monitor, and the audio
interface are powered entirely or partially by electromagnetic induction.
Although audio cables may be affected by electromagnetic interference,
basically these are supposed to be shielded to work most effectively and do not
use electromagnetic induction to operate. Moreover, the digital audio software
is just a computer application on virtual studios, thus do not also operate on the
EMI principles.
Answer:
maybe because they want to keep it a secret
