How can an administrator improve the relevance of search results for support agents searching for knowledge articles to solve articles? Choose 3 answers

How can an administrator improve the relevance of search results for support agents searching for knowledge articles to solve articles? Choose 3 answers
A . Pre-populate article search filters based on the values of case fields.
B . Define synonyms for common search terms.
C . Enable feed tracking on all relevant article types.
D . Create data categories and assign articles to each category.
E . Create a record type for each data category.

Answer: A,B,D