What would you use as a central location to explore the CMDB class hierarchy, CI table definitions, and CIs?

What would you use as a central location to explore the CMDB class hierarchy, CI table definitions, and CIs?
A . CI Remediations
B. CI Relation Types
C. CI Identifiers
D. Process to CI Type Mapping
E. CI Class Manager

Answer: E

Explanation:

Reference: https://docs.servicenow.com/bundle/orlando-servicenow-platform/page/product/configuration- management/concept/c_CMDBClassifications.html