A Viable Approach to Addressing the Quality of Primary Studies

A viable approach to addressing the quality of primary studies included in a meta-analysis is which of the following?

A) Ignoring the problem of quality by using all studies regardless of rigor
B) Doing sensitivity analyses to assess if the effects change when low-quality studies are included.
C) Using a random effects model rather than a fixed effects model.
D) Using a forest plot to assess the degree to which study quality is related to effect size.