Concept:Balance of payment problems in developing countries stem from their reliance on exporting raw materials and importing expensive manufactured goods.
Explanation:Developing countries mainly export raw materials such as cocoa, crude oil, and minerals.
These raw materials are sold at relatively low prices.
The same developing countries then import finished manufactured goods, which are sold at much higher prices.
This makes their total import value exceed their total export value, causing an unfavourable balance of payment.
In contrast, bargaining power, weak currencies, and low demand for exports are secondary or indirect factors, not the main structural cause.
Answer:B. most of their exports are raw materials.