GWD 17-19 没有看到讨论结果的题

Regardless of their form or function, all aerodynamically enhanced, curved objects made for throwing have been called boomerangs by non-Australians even since 1788, when Europeans saw Dharug-speaking men tossing “bumariny” in the area later known as Sydney.

1. Regardless of their form or function, all aerodynamically enhanced, curved objects made for throwing have been called boomerangs by non-Australians ever since 1788,
2. Regardless of their form or function, any aerodynamically enhanced, curved object made for throwing has been called a boomerang by non-Australians ever since 1788,
3. Ever since 1788, non-Australians have called all aerodynamically enhanced, curved objects made for throwing boomerangs, regardless of their form or function, from
4. Ever since 1788, any aerodynamically enhanced, curved object made for throwing has been called a boomerang by non-Australians, regardless of its form or function, from
5. Non-Australians have called all aerodynamically enhanced, curved objects made for throwing boomerangs ever since 1788, regardless of their form or function, from

这道题的讨论好像还没有定论啊？我选A，答案选E，可是regardless对boomeranger 和when对1788的修饰似乎都太远了吧，请问A又错在哪里了呢？http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=194275&replyID=&skin=1

我暂时也选A，我没有看答案。B的their么有指代；C的their不能指代non-Australians；D的时间与when太远。

E的regardless两边都有“，”是插入语，可以去掉，所以from when还是修饰1788的，我没选这个是因为from when的语法不清楚对不对

prep给的答案是a

e里from不对