What Are the Basic Problems with Meta-Syntheses of Qualitative Research

What are the basic problems with meta-syntheses of qualitative research?

A) Qualitative research itself is a subjective interpretation; a meta-synthesis of qualitative research is a compiling of information generated subjectively.
B) If individual studies have different methods, it may be difficult to find common ground and to devise a meaningful interpretation of the results.
C) Qualitative research has no implications for practice, so performing a meta-synthesis is unjustifiable.
D) In qualitative research, multiple valid interpretations may occur if different researchers examine the text.
E) The recommendation for practice that results from meta-synthesis of qualitative research lacks statistics.
F) The raw data are not available to the qualitative meta-synthesizer.