Rejection Reasons

I just got rejection for my 5 uploads.

The reason in the mail is just a copy/write. No clear and there is no solution suggest.

I dont understand. Is that about sound quality? Music quality? Or anything that i didnt realized.

In this uploads, there are too many differences between them.

2 of cheesy but smooth,
2 of kind a unique,
and one piece of traditional middle west march style.

Some of them have better qualities.

This is my confusing. All of them got same reason(no reason) rejection.

What is the qualification about that? Which thing that i must fix?

Please help. Thanks for your time.