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 favour even though the colleague did not make a serious contribution to the pa per.