Which statement should be used to perform the DML necessary to insert new records and update existing records in a List of Order__c records?

A company has a custom object, Order__c, that has a required, unique, external ID field called Order_Number__c .

Which statement should be used to perform the DML necessary to insert new records and update existing records in a List of Order__c records?
A . upsert orders;
B . merge orders;
C . merge orders Order_Number__c;
D . upsert orders Order_Number__c;

View Answer

Answer: D