Which form of packaging is utilized for low-level commercial radioactive shipments?

The correct answer identifies the types of packaging commonly used for low-level commercial radioactive shipments. Cardboard boxes, wooden crates, and metal drums are widely utilized because they provide sufficient strength and stability for safely containing radioactive materials during transportation. These materials can effectively protect against exposure to radiation and are designed to adhere to regulatory requirements for shielding and containment.

In addition, these types of packaging are often less expensive and simpler to handle, which suits the needs of low-level waste that, while still hazardous, does not require the more stringent controls reserved for higher-level radioactive materials.

Other options like high-density polyethylene containers, glass vials, and vacuum-sealed metal canisters may have specific applications in different contexts or for other substances but are not the standard for low-level radioactive shipments. For instance, high-density polyethylene is commonly used for chemical containers but is not specified for radioactive waste transport. Similarly, while glass vials can be used for some radioactive materials, they may not provide the necessary bulk packaging needed for larger shipments. Vacuum-sealed metal canisters tend to be reserved for more specialized applications involving higher levels of radioactivity or particular types of hazardous materials.