Who is authorized to sign for and use the keys and stamps?

The correct option highlights that the receiver is tasked with the signing for and usage of keys and stamps. This role is critical within the asset protection framework as receivers are responsible for managing inventory and handling deliveries, which often require access to secure areas and documentation processes that involve these tools.

Having a designated individual, such as the receiver, ensures that there is accountability and oversight in the usage of keys and stamps. This safeguards the assets and inventory of the store, minimizing the risk of theft and error that could occur if multiple employees had access to these secure items.

In contrast, allowing any store employee or even roles like the store manager or head cashier to have access could lead to a lack of control over when and how these resources are utilized. Having a specific person in charge maintains a clear line of responsibility, which is crucial for effective asset protection measures.