Why Do Rich Countries Sometimes Promote Policies That Hurt Less

Why do rich countries sometimes promote policies that hurt less developed countries?

A) Rich countries want to keep poor countries poor so they have cheap sources of food imports.
B) Rich countries do not know that their policies hurt poor countries.
C) Rich countries want to keep poor countries poor so that they will never become military threats.
D) Rich countries often protect the interests of powerful domestic groups at the expense of poor countries.