An engineer for Hexetron Systems, Inc. figured out a clever new way to shape the lid for the battery compartment on hand-held radiation detectors such that the lid can easily be unlatched and opened, or closed and secured, even when the operator is wearing heavy lead-shielded gloves. Which of the following regimes offers the best prospects for intellectual-property protection for the shape of the battery compartment lid under these facts? (A) copyright (B) trademark patent right of publicity trade secret