Concept:The Nigerian Ports Authority handles port operations and provides essential facilities at the docks for cargo and shipping.
Explanation:The authority is responsible for providing and operating necessary facilities at the ports.
It also maintains, improves, and regulates the use of these ports to support shipping activities.
One of its practical functions is providing warehousing facilities at the docks for storing goods.
This matches the role of managing port infrastructure rather than giving credit, protecting infant industries, or offering preferential treatment to investors.
Answer:D. provides warehousing facilities at the docks.