Sentence Correction

The bowerbirds of Australia derive their name from the fact that the males build elaborate bowers of sticks and twigs to attract females, decorating them with flowers and other vegetation in a display of courtship.

A)the fact that the males build elaborate bowers of sticks and twigs to attract females, decorating them with flowers and other vegetation

B)the elaborate bowers of sticks and twigs that the males build and decorate with flowers and other vegetation in order to attract females

C)the elaborate bowers of sticks and twigs, decorated with flowers and other vegetation that the males use to attract females

D)the fact that the males build elaborate bowers of sticks and twigs, having decorated them with flowers and other vegetation, to attract females

E)the elaborate bowers of sticks and twigs that are built by the males and decorated with flowers and other vegetation to attract females

Why are D and A wrong. I understand there is pronoun reference problem. But the explaination says, the bowerbirds cannot derive their name from "the fact", but rather from "bowers of sticks and twigs".

Does not make sense to me. Someone please explain.

OA is B

tough question -but follow the rules of SC and it would lead u to the Ans

Ans is B

A is wrong as "Them" refers to what sticks twigs femals?

D is wrong - what does "to" modify -vegetation

e - has parallsim error - that are built hence requires that are decorated

c is wrong decorated modifies twigs

why in

B)the elaborate bowers of sticks and twigs that the males build and decorate with flowers and other vegetation in order to attract females

"That" doesnt make a reference problem since it could be referred to "twigs" or "bowers" ?

*I know by referring to the meaning this problem can be solved but as i understood in GMAT, even the possibility can make an error