Which one of the following belongs to the category of good research ethics?

[A] Publishing the same paper in two research journals without telling the editors.

[B] Conducting a review of the literature that acknowledges the contributions of other people in the relevant field or relevant prior work.

[C] Trimming outliers from a data set without discussing your reasons in a research paper.

[D] Including a colleague as an author on a research paper in return for a favor even though the colleague did not make a serious contribution to the paper