Avery works with the compliance team for a major health insurance agency. His team is responsible for monitoring current legislation, regulatory changes and updates, related court case documentation, and how all of these shifting guidelines and requirements affect his company's own documentation and work processes. His team must also monitor vast volumes of internal data to search for signs of fraud or other indications of non-compliance. 

What kind of system might be best suited to assist Avery and his team in monitoring the high volume of compliance documentation and related data? 

a. RPA system 

b. Expert system 

c. CBR system 

d. Knowledge base management system