A. The organization should change existing Opportunities to the new naming convention by using the
"Refresh All Opportunity Names" button in Bulk Data Processes.

B. The organization should only change existing Opportunities to the new naming convention by using the
"Refresh Name" action.

C. The custom naming convention only applies to new Opportunities of matching record types; it is not retroactive.

D. The organization should change existing Opportunities to the new naming convention through an upsert.