D Puts an Item from a Supermarket Shelf into Her

Multiple Choice

D puts an item from a supermarket shelf into her basket intending not to pay for it. She leaves the shop with the item without paying. When does appropriation occur:

A) When she leaves the shop.
B) When she goes through the check-out.
C) When she puts the item in her basket.
D) When she picks the item off the shelf.