Students in a Methodology Class Conducted Individual Experiments

Students in a methodology class conducted individual experiments. Alfred failed to find a significant effect eventhough the significant effect actually existed. Another student,Greta, erroneously concluded that her results were significant.Alfred's conclusion reflects a _____ and Greta's conclusion reflects a _____.

A) failure to use the correct inferential statistic; failure to use the correct descriptive statistic
B) Type II error; Type I error
C) failure to replicate his findings; lack of power in her study
D) Type I error; Type II error