A nurse is reviewing the hierarchy of evidence with a student nurse who asks which type of study provides the strongest evidence for deciding whether a new fetal monitoring technique should be adopted. The nurse explains that systematic reviews and meta-analyses rank highest because they synthesize multiple studies. Which statement by the student indicates understanding of why this level of evidence is most reliable?
- "These studies describe outcomes from a single facility's implementation of the monitoring technique."
- "These studies are based on expert opinions from experienced obstetricians and midwives."
- "These studies combine results from multiple randomized controlled trials to reduce bias and increase sample size."
- "These studies use qualitative methods to explore patient experiences with fetal monitoring."