关于过去分词修饰对象的问题

liguohui

Believed to originate from a small area on their foreheads, elephants emit low-frequency sounds that may be used as a secret language to communicate with other members of the herd.
(A) Believed to originate from a small area on their foreheads, elephants emit low-frequency sounds that may be used
(B) Elephants emit low-frequency sounds that are believed to originate from a small area on their foreheads, and they may use this
(C) Elephants emit low-frequency sounds, believed to originate from a small area on their foreheads, that they may use
(D) Originating, it is believed, from a small area on their foreheads; elephants emit low-frequency sounds they may use
(E) Originating, it is believed, from a small area on their foreheads, low-frequency sounds are emitted by elephants that may be used
2.An attempt to ratify the Equal Rights 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 Rights Amendment, begun almost two decades ago,
(B) begun almost two decades ago, for ratifying the Equal Rights Amendment
(C) begun for ratifying the Equal Rights Amendment almost two decades ago
(D) at ratifying the Equal Rights Amendment, begun almost two decades ago,
(E) that has begun almost two decades ago to ratify the Equal Rights Amendment
同样是插入的过去分词做修饰语，为什么第一题修饰主句宾语，而第二句修饰主句主语呢，其实这样的例子还有许多，请赐教

dreadpower

优先就近修饰