_______ the one-child policy, our country has controlled the population successfully.

A. Thanks to                                   B. Thanks for                                C. As for

在国内或者国外某一地区发生（）流行时，国务院卫生行政部门可以宣布该地区为疫区。

A．检疫传染病

B．监测传染病

C．艾滋病

D．禽流感