A Major Drawback to Using the Vote-Counting Approach to Integrate

A major drawback to using the vote-counting approach to integrate the results of research is that

A) the statistical significance of the results of a study is dependent on sample size.
B) the information needed to classify study results is not always available in the research report.
C) studies with very high statistical power might be incorrectly classified as not supporting the hypothesis being investigated.
D) it can only be used with studies that used the qualitative research paradigm.