大全177，谢谢

1.        Bihar is India’s poorest state, with an annual per capita income of $111, lower than in the most impoverished countries of the world.

(A) lower than in

(B) lower than that of

(C) and lower than that of

(D) which is lower than in（B）

(E) which is lower than it is in

答案没问题，但我想知道若e改为lower than it is in是否对，在这种情况下的it的指代我老搞不清

nice point. I will check it out.

1.
            Bihar is India’s poorest state, with an annual per capita income of $111, lower than in the most impoverished countries of the world.

(B) lower than that of（为什么用of, 用in不行吗？of 从$111前面的那个of并列出来的？）

(C) and lower than that of(请问这句用and错在哪里？用and两个句子必须连起来吗？还是and前后不并列？）

(E) which is lower than it is in

E还是不明白．it为什么不能像that那样指带an annual per capita income?为什么必须指带an annual per capita income $111?

不好意思，这题我是一年以来都没理解．非常感谢解答！