[讨论]GWD一道语法题，貌似没有讨论过

The electronics company has unveiled what it claims to be the world's smallest network digital camcorder, the length of which is that of a handheld computer, and it weighs less than 11 ounces.

A. to be the world's smallest network digital camcorder, the length of which is that of a handheld computer, and it weighs
B. to be the smallest network digital camcorder in the world, which is as long as a handheld computer, weighing
C. is the smallest network digital camcorder in the world, which is as long as a handheld computer, and it weighs
D. is the world's smallest network digital camcorder, which is as long as a handheld computer and weighs
E. is the world's smallest network digital camcorder, the length of which is that of a handheld computer, weighing

The answer is B.

但是B选项中，which没有直接跟在camcorder后面而是在world后面，这不是一个致命的错误吗？另外weighing表示伴随，是修饰which吗？我记得好像看到过说这样的结构修饰从句的主语会有歧义

我的选择其实是D，因为一上来我就因为上面这个原因把BC都扔掉了，然后A选项的比较明显有逻辑错误，接着就是DE，虽然也有问题，因为unveil后面貌似没有that，其实我不是很清楚unveil是不是可以跟宾语从句，但是如果可以，D选项除了省略了that，其它都是可以的。

请大家指教

1.简介回答：，加which 是正确的

2. 现在分词修饰主句正确

explain：

先说which

wh前面有逗号的是非限制性定语从句

which 前面加逗号，应该是对整个sentence修饰，并且去掉以后不会太影响句子的意思

例如下面这道题：

The combination of satellites, which transmit information , computers , which store information , and television , which displays information , will change every home into an education and entertainment center .

　　（此句中，三个非限定性定语从句分别对三个先行词：satellites ，computers和television进行补充、说明。如果去掉这三个非限定性定语从句，那么句子可简化为：

　　The combination of satellites , computers and television （，which ……）will change every home into an education and entertainment center .）卫星能传输信息，计算机能储存信息，电视能显示信息，把这些手段结合起来可以使每个家庭都成为教育娱乐的中心