In Terms of Inclusion and Exclusion Criteria for Primary Studies

In terms of inclusion and exclusion criteria for primary studies to be included in a meta-analysis, the textbook recommends:

A) exclude studies that are methodologically poor, as these effects will contaminate the summary effect
B) exclude studies that are methodologically poor, and switch to vote counting
C) include studies that are methodologically poor, but perform study-level moderation analysis of rigorously vs. poorly designed studies
D) include studies that are methodologically poor, but perform study-level mediation analysis of rigorously vs. poorly designed studies