各位好，请教一下
a. But they'll understand your email as you wrote it.
b. But they'll understand your email as you wrote.
c. I invested the money in the way that you suggested.
为何c是对的，但b是错的，而a是对的？
我的想法：
c. I invested the money in the way that you suggested.
→c'. You suggested how I invested the money.
d. They'll understand your email in the way that you wrote.
→d'. You wrote how they would understand your email.
e. They'll understand your email in the way that you wrote it.
→e'. You wrote your email in the way they'll understand.
→e''. They'll understand how you wrote your email.
网友jutfrank
(d) doesn't work. You need "it" at the end.
网友GoesStation
(d') is ungrammatical.
我实在不懂(d)和(d')（也就是前文的b.）错在哪里？这两句想表达的是，他们会懂你的
电子邮件，而你把他们会怎么懂的那个状况写出来。
在英语论坛询问https://goo.gl/mojjRP，但没有得到确切解答，因此就教于各位
谢谢！