By citing the fact that "the number had shrunk to 39 out of 220" ( Line 3－4, Para

By citing the fact that "the number had shrunk to 39 out of 220" ( Line 3-4, Para.2), the author sug- gests that _______.（ ）

[A] the poverty in the middle-income countries is alleviated tremendously

[B] the life of children in the middle-income countries has become better

[C] poor people's living conditions don't change although the number reduced

[D] the financial aid to the world's poorest countries achieves great success