Which of the Following Statements About Using Only Published Studies

Which of the following statements about using only published studies in literature reviews is FALSE?

A) Because of the bias against publishing null results, published research might overestimate the effects of an independent variable.
B) Journals tend to publish studies that support accepted theories and not publish studies that contradict those theories.
C) Few published studies provide enough methodological information to provide an accurate picture of how the research was conducted.
D) The peer review process provides a check on the internal validity of published studies.