Which approach should a developer take to automatically add a “Maintenance Plan” to each Opportunity that includes an “Annual Subscription” when an opportunity is closed?

A. Build a OpportunityLineItem trigger that adds a PriceBookEntry record.
B. Build an OpportunityLineItem trigger to add an OpportunityLineItem record.
C. Build an Opportunity trigger that adds a PriceBookEntry record.

D. Build an Opportunity trigger that adds an OpportunityLineItem record.