OG12-55

Flicka9

论坛上找不到相关的解答，大概是大家都明白吧，谢谢大家了

55.Many house builders offer rent-to buy programs that enable a family with insufficient savings for a conventional down payment to be able to move into new housing and to apply part of the rent to a purchase later.
(A）programs that enable a family with insufficient savings for a conventional down payment to be able to move into new housing and to apply
(B)programs that enable a family with insufficient savings for a conventional down payment to move into new housing and to apply
(C)programs; that enables a family with insufficient savings for a conventional down payment to move into new housing, to apply
(D)programs, which enables a family with insufficient savings for a conventional down payment to move into new housing, applying
(E)programs, which enable a family with insufficient savings for a conventional down payment to be able to move into new housing, applying

问题：OG上解释E选项说‘the comma after programs is incorrect, because the clause is meant to be restrictive'，请问是什么意思？

nemiah

我理解限制性修饰是那种去掉就影响句子想要表达的中心意思的成分。如果是非限制性的修饰，去掉后不会影响句子的中心成分。

个人理解，欢迎讨论。