Answer:
b.Africa
Step-by-step explanation:
Some african countries like the Democratic Republic of Congo and Botswana are the biggest diamond producers in the world. Having said this and, considering the high govermental and militar corruption in Africa, should lead this continent to become target of this attention and policy.
Corruption in South America is also considerable, but its diamond production is not so important.
Australia has not considerable corruption.
Antarctica has no diamond production.