while, when, or as John was reading . .

Question

In the following sentence, which conjunction should be used?

While/when/as John was reading, Peter was listening to music.

I'd appreciate your help.

Answer 1

While is best for a simple statement that two continuous events were happening at the same time.

When would, I think, imply that every time John sat down with a book, Peter put music on.

As is often used with a gradual change - As the water level was rising - As her health improved...