关于非限制性定语从句修饰对象的疑惑？

veveygum

A attempt to ratify the Equal Right Amendment, begun almost two decades ago, has been unsuccessful despite efforts by many important groups, including the National Organization for Women.
A)to ratify the Equal Right Amendment, begun almost two decades ago,
B)begun almost two decades ago, for retifying the Equal Right Amendment
C)begun for retifying the Equal Right Amendment almost two decades ago
D)at retifying the Equal Right Amendment,begun almost two decades ago,
E)that has begun almost two decades ago to retify the Equal Right Amendment

这里答案选A。疑惑的是begun almost two decades ago所修饰的应该是attempt吧，而非限制性定语从句不是应该紧跟其所修饰的对象吗？按照A的说法，begun almost two decades ago就应该修饰the Equal Right Amendment了。搞不懂，非限制性定语从句可以跃前修饰吗？

iamsan1984

,which与that/which区别是它与前面的名词关系不紧密，是addtional information，can be drop out.这里which指代的是a attempt.如果用that/which要紧跟所修饰名词的后面，所以这里用了,which.

不过n1 of n2 which/that并不能判断指代谁，要从从句的语法上避免误会。