Dr McNulty Included a Post-Experimental Interview in His Study Procedures

Multiple Choice

Dr. McNulty included a post-experimental interview in his study procedures. It is probably acceptable to discard questionable data based on this interview if

A) the study was conducted online rather than face-to-face.
B) he used a convenience sample and so can easily replace the dropped participants.
C) he set the criteria for discarding data in advance.
D) any of the above occurred.