prep2-101

101.      (29777-!-item-!-188;#058&004380)

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

有哪个NN帮着解释一下has unveiled what it claims is...........是什么结构，看不懂

有何不同？还是没明白啊，再详细讲讲，多谢

D