What Are the Requirements for the Doctrine of Entrustment to Apply

What are the requirements for the doctrine of entrustment to apply?

A) The goods must be entrusted to a merchant who deals in goods of the kind.
B) The entrustee may transfer the rights of the entruster only if the buyer is a purchaser in ordinary course.
C) The owner must have delivered the goods to a merchant or permitted him to retain them.
D) All of the above.