Which reports can the help desk manager use to determine the quality of the articles?

A team of publishers has created and published articles in Salesforce knowledge. The manager of the help desk describe articles are useful to agents .

Which reports can the help desk manager use to determine the quality of the articles? Choose 2 answers
A . Report on the articles followed in Chatter
B . Report on agent ratings on articles
C . Report on agent feedback on articles
D . Report on the articles attached to cases

Answer: B,D