一道(SAT) 语法 句子优化题!

问题描述:

一道(SAT) 语法 句子优化题!
A healthy economy can be measured not only by the growth of business but (it has a) psychological effect on people.
a.it has a
b.as well in the
c.also by the
d.also the
e.in the way of having a
请问答案是什么?为什么?

个人认为选择C
not only...but also.是常用固定表达,“不仅.也.”
英语句子一般格式整齐要求严谨,not only 后面与but also 后面并列的成分要相类似,前者后面是by +名词,后者也应如此