24.   Even though its per capita food supply hardly increased during two decades, stringent rationing and planned distribution have allowed the People’s Republic of China to ensure nutritional levels of 2,000 calories per person per day for its population.

(A) Even though its per capita food supply hardly increased during

(B) Even though its per capita food supply has hardly increased in

(C) Despite its per capita food supply hardly increasing over

(D) Despite there being hardly any increase in its per capita food supply during

(E) Although there is hardly any increase in per capita food supply for

A,B中的its应该指代the People's Republic of China, 但是这样不是和主句中的stringent rationing and planned distribution不符合了吗?

请大牛指教! 谢谢

在有省略的情况下才需要一致，没有省略的时候完全可以不一致，只要能表示出它的指代对象就可以了。

你说的情况，应该是那种连续两个分句的主语一致，前一个或者后一个分句的谓语动词的部分或者整体可以省略。但是上题中并未出现省略的情形。