Concept:The decline in the importance of rail transport in Africa is mainly due to the growing advantage of road transport over railways.
Explanation:Road transport has become a stronger competitor in Africa.
Improved road networks allow trucks to move goods faster and more flexibly than trains.
Trucks can deliver directly from one location to another, while trains are limited to fixed rail lines.
As a result, many businesses and passengers now prefer road transport over rail services.
This competition has greatly reduced the role of railways in the continent's transport system.
Answer:C. High competition from road transport