Concept:Railway corporations in West African countries are public enterprises owned by the government.
Their major source of finance therefore comes from the state rather than private investors.
Explanation:Since the government owns these corporations, they do not mainly depend on selling shares to the public.
Their principal funding is received as government subvention, which is financial support or a grant given by the government.
This subvention is used to meet operating expenses and to carry out capital projects.
Trade credit, which is borrowing from suppliers, is not a major source for such public corporations.
Surplus from operations may arise, but it is not the primary or guaranteed source of finance.
Therefore, the most reliable and major source of finance is the financial assistance provided by the government.
Answer:B. government subvention