Final answer:
To find the highest level of evidence in citations, the 'Article Types' filter option is typically used, as it includes systematic reviews, meta-analyses, and randomized controlled trials.
Step-by-step explanation:
To limit citations to find the highest level of evidence, one would typically use Article Types as a filter option. This is because article types can include systematic reviews, meta-analyses, and randomized controlled trials, which are considered higher levels of evidence in the hierarchy of study designs. Choosing specific article types can help in finding the most rigorous and reliable evidence available for clinical questions or health-related research.