Why Are Adverse International Conditions Insufficient for Explaining Why Some

Why are adverse international conditions insufficient for explaining why some countries remain poor?

A) Some developing countries have been successful at developing,despite adverse international conditions.
B) In general,international conditions have been favorable for economic development.
C) In general,international conditions have had no effect on economic development.
D) International conditions are adverse only for colonies and have no effect once colonies become independent.
E) Adverse international conditions have been offset by foreign aid from developed countries.