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I have the answer to this question, but don’t understand the reasoning why this happens. Can someone explain in detail what’s going on here?
What happens when a parent record is deleted in the Parent Child model having a Lookup Relationship between Parent – Child Objects?
source: http://www.allaboutsfdc.com/dev-401-quiz-part-1-q9.php
A lookup is a reference on one object to another object, although you could call the referred object the parent and referring one the child, the relationship can be deleted and changed.
A master-detail relationship is a stricter relationship, where the children (detail records) are tied to the parent (master). They can’t be moved to another master (yet – this is coming soon) and deleting the master will delete all of it’s children.
Best bet when establishing a schema is to always create relationships as a lookup first, as you can convert them to Master Detail relationships when required, but you can’t go back the other way.
Thus to answer the question: since the question says Lookup and not Master Detail the children would not be deleted so the answer here is D.