Explanation
A: Account Rules by Segment
Define segment rules to derive a specific segment of the general ledger account. For example, a particular segment like the company segment can be determined from the distribution account. Another segment can be determined with the use of a constant value. Creating the account one segment at a time offers greater flexibility, but also requires more setup.
C: You can use a Distribution Set to automatically enter distributions foran invoice when you are not matching it to a purchase order. For example, you can create for an advertising supplier a Distribution Set that allocates advertising expense on an invoice to four advertising departments.
References:https://docs.oracle.com/cd/A60725_05/html/comnls/us/ap/distsets.htm

Explanation
Provision the implementation user with the Application Implementation Manager job role or the Application Implementation Consultant job role by usingthe Security Console Users tab.
References:https://docs.oracle.com/cloud/latest/financialscs_gs/FACSF/FACSF1004385.htm