In Claims Administration Terminology, a Claims Investigation Is Correctly Defined

In claims administration terminology, a claims investigation is correctly defined as the process of

A) reporting management information about services provided each time a patient visits a provider for purposes of analyzing utilization and provider practice patterns
B) obtaining all the information necessary to determine the appropriate amount to pay on a given claim
C) routinely reviewing and processing a claim for either payment or denial
D) assigning to each diagnosis or treatment reported on a claim special codes that briefly and specifically describe each diagnosis and treatment