Pipes & culverts company orders six irrigation pumps from quality plumbing, inc. the pumps are stored in restorers warehouse. under the terms of the order, quality must give pipes a warehouse receipt for the goods, which pipes will then pick up. title to the goods passes to pipes when
(a) quality stores the drives.
(b) pipes & culverts orders the drives.
(c) pipes & culverts picks up the drives.
(d) quality gives pipes & culverts a warehouse receipt for the drives.