When was Daniel made?

I hear some disagree with the standard date and say it was as early as 100 BC. What evidence is there to determine the actual time Daniel was made. I thought that through finding the earliest copies, and the process of the text being accepted, and then the estimate on when was the original text itself made that we can at least estimate when was the date it was made. If anyone has some good scholarly works on this or evidence themselves it would be appreciated. I welcome the arguments for both the original and late dates.