Which components are found in the structural design of a container?

The correct choice highlights the essential components that are integral to the structural design of a shipping container. Specifically, corner fittings, posts, and end rails are critical for ensuring a container's strength and integrity.

Corner fittings serve as attachment points for handling equipment, allowing containers to be easily lifted and secured. They also contribute significantly to the overall stability of the container when stacked. The posts provide vertical support along the length of the container, maintaining its shape under various loading conditions. End rails add rigidity and strength to the sides of the container, ensuring that it can withstand external pressures during transport.

Choosing this option reflects an understanding of the overall structure and functionality of containers utilized in intermodal transportation, which is key in maintaining cargo safety and security during transit.