Read the following article excerpt about the John Brown trial of 1859 and answer the question. We rejoice that old BROWN has been hung. He was not only a murderer of innocent persons, but he attempted one of the greatest crimes against society—the stirring up of a servile and civil war. He has paid the penalty for his crimes, and we hope his fate may be a warning to all who might have felt inclined to imitate his aggressive conduct.
—Cincinnati Enquirer

Would this article be appropriate to use for research purposes?

No, it has too strong of a slant.
Yes, it has a slant.
No, it does not have enough factual information.
Yes, as long as the slant is qualified.