Explanation
A: You can drill through to the detail from the EPM target application and view data in the Enterprise Resource Planning (ERP) source system. Predefined by administrators, drill-through reports are available to users from specified individual member cells and data cells. A cell can be associated with multiple drill-through reports. Cells that contain drill-through reports can be indicated on the grid by a cell style.
B: Data loads and write-back are supported for those users who do not have a direct connection to their Enterprise Resource Planning (ERP) source data, but have data available from their source in a text file. Any file, whether it is a fixed width file or a delimited file, can be easily imported into an Oracle Enterprise Performance Management Cloud application.
References: https://docs.oracle.com/cloud/latest/epm-common/ERPIA/toc.htm