What Types of Data Situations Would Suggest That the Statistical

What types of data situations would suggest that the statistical analysis of data is not warranted in single-subject research?

A) You have an ambiguous baseline (e.g., a trend where the scores are moving up during the first part of the baseline and moving down during the second part of it) .
B) an erratic baseline (e.g., scores are moving up and down in a rather dramatic manner, like 12, 23, 24, 11, 17, 31, 26, 10)
C) either an ambiguous baseline or an erratic one
D) You have an unambiguous trend during the treatment period.