Why Did Argentine Economist Raúl Prebisch Think Trade Worked Against

Why did Argentine economist Raúl Prebisch think trade worked against the interests of less developed countries (LDCs) ?

A) His research found that trade inevitably hurt the economies of all countries,whether developing or developed.
B) His research found that the experience of colonialism permanently damaged the chances of industrialization for LDCs.
C) His research found that international organizations were deliberately creating trade agreements that hurt LDCs' interests.
D) His research found that,over time,the price of LDCs' manufactured goods decreased relative to the price of developed countries' goods.
E) His research found that,over time,the price of LDCs' primary exports decreased relative to the price of developed countries' manufactured exports.