A World Bank study found that charging user fees for medical treatment in developing countries

A) had no significant effect on treatment rates.
B) dramatically reduced treatment rates.
C) slightly increased treatment rates.
D) greatly increased treatment rates.

Charging user fees for medical treatment in developing countries has been found to dramatically reduce treatment rates. This is because the additional cost can make it difficult for people in these countries, who often have limited financial resources, to afford necessary medical care.