Answer:
a. containerization
Explanation:
The containerization is defined as the system which uses intermodel containers for freight transport. By this methods, each container is considered an unit of product instead of smaller parts. The transport between shipment methods would be facilitated without affecting to commodities inside each containers. In addition, when many products are in the containers, the quantity of parcel can be easily controller. The standardized dimensions of containers used can help the exporter, importer or transporter easily make plan about shipment by different means.