Homework.

1) Does the author of this article show any bias toward either rock or disco? If so, how can you tell?

In my opinion, this article didn't show any clear bias towards either party. Though it did give more information and elaboate a little more on the rock genre.

2) Which type of music (rock/disco) is most like today's popular music?

I would say rock, but this is more of a personal preference. People who like to listen to disco would probably answer the opposite.

3) Would anything change if this article was written today instead of over twenty years ago?

It would still be set looking at events of the past, so not really, though it might end with that there is very little rock/disco conflict nowadays. That I see.