ServiceNow contains a resource which provides the following:$1)$ A standard and shared set of service related definition across service now products and platforms that will enable and support true service level reporting$\mathrm{.}2)$ A CMDB framework across our products and platforms that will enable and support multiple configuration strategies.What resource do these statements describe?A Common Service Data Model $($CSDM$)$B Information Technology Infrastructure Library $($ITIL$)$C Information Technology Service Management $($ITSM$)$D Configuration Management Database $($CMDB$)$