When is an Apex Trigger required instead of a Process Builder Process?

When is an Apex Trigger required instead of a Process Builder Process?
A . When a record needs to be created
B . When multiple records related to the triggering record need to be updated
C . When a post to Chatter needs to be created
D . When an action needs to be taken on a delete or undelete, or before a DML operation is executed.

View Answer

Answer: D