A Failure to Replicate a Study May Mean That

A failure to replicate a study may mean that

A) the original results represent a Type I error.
B) the experimenter was careless or incompetent.
C) a crucial aspect of the original procedure was omitted in the report.
D) the experimenter may have been careless or the original results represent a Type I error or a critical aspect of the original procedure may have been omitted.