[求助]suggest知识点

这个知识点，今天发现有点糊涂。

大全604提醒我需要全面的了解suggest的各种用法

604       Repelled by bodily punishments such as maiming and branding, the idea of penitentiaries were reforms of the penal system by Quakers.

(A) the idea of penitentiaries were reforms of the penal system by Quakers

(B) penitentiaries were ideas for reform of the penal system suggested by Quakers

(C) Quakers suggested the penitentiary as a reform of the penal system

(D) Quakers suggested that the penal system be reformed as penitentiaries（C）

(E) the penitentiary was suggested to be a reform of the penal system by Quakers

正确选型C。

D项，单看结构的话，suggest后面接that从句，省略should是否正确呢？我在OG上还没有看到suggest用虚拟语气的题目。另外，大家已知的，GMAT经常会考suggest的什么用法呢？欢迎讨论。

谢谢楼上GG，您的意思是，suggest that +be / 动词原形 这个结构是正确的咯？