Which of the Following Is True of a Collecting Bank

Which of the following is true of a collecting bank?

A) A collecting bank is an agent of the owner of an item only after settlement becomes final.
B) The relationship between a collecting bank and the owner of an item, once settled, becomes a debtor-creditor relationship.
C) A collecting bank may not be a sub-agent of the owner until settlement becomes final.
D) Collecting banks must give substantially more  warranties  than those given by parties under Article 3 upon presentment and transfer.