OG10 81 S省略过度？

         语法

81. In 1973 mortgage payments represented twenty-one percent of an average thirty-year-old male's income;
                    and forty-four percent in 1984.

(A)  income; and forty-four percent in 1984

(B)   income; in 1984 the figure was forty-four percent

(C)  income, and in 1984 forty-four percent（C为什么不对？！！？）

(D)  income, forty-four percent in 1984 was the figure

(E)   income that rose to forty-four percent in 1984

词汇mortgage n&v 抵押

1 “；“前后要有2个完整的主句

2 that做定语从句修饰错误的修饰了income，而第二句的主语应该还是mortgage payments，所以改变原意

为什么C不对呢

顶～～