A Teacher Grading Papers Opens the Door of the Room

A teacher grading papers opens the door of the room in which she has been working and becomes aware of loud rock music coming from her son's radio. When she asks him to turn it off, he asks why she is just noticing it now when he's had it on for over 20 minutes. Which of the following psychological explanations is the least plausible explanation of what occurred after she opened the door?

A) The volume of the music reached the threshold needed to fire her neurons.
B) The number of neurons firing increased considerably, bringing the music to her conscious awareness.
C) The neurons involved began to fire more quickly than they had before.
D) The strength of the neural impulses in each of the firing neurons increased markedly, bringing the music to her conscious awareness.