PREP SC: logical &pronoun:the systematic clearing of forests

[lawrencewwh]

Not only did the systematic clearing of forests in the United States create farmland (especially in the Northeast) and gave consumers relatively inexpensive houses and furniture, but it also caused erosion and very quickly deforested whole regions.

A. Not only did the systematic clearing of forests in the United States create farmland (especially in the Northeast) and gave consumers relatively inexpensive houses and furniture, but it also
B. Not only did the systematic clearing of forests in the United States create farmland (especially in the Northeast), which gave consumers relatively inexpensive houses and furniture, but also
C. The systematic clearing of forests in the United States, creating farmland (especially in the Northeast) and giving consumers relatively inexpensive houses and furniture, but also
D. The systematic clearing of forests in the United States created farmland (especially in the Northeast) and gave consumers relatively inexpensive houses and furniture, but it also
E. The systematic clearing of forests in the United States not only created farmland (especially in the Northeast), giving consumers relatively inexpensive houses and furniture, but it

OA is D.
but I chose B.

(I read Ron's explanation about the usage of NOT ONLY...BUT ALSO & BUT in another thread regarding this SC, but I still have 2 questions on D.)

1st question on logical meaning of the sentence:

The systematic clearing of forests can NOT do this thing as
gave consumers relatively inexpensive houses and furniture ,

instead farmland CAN DO
gave consumers relatively inexpensive houses and furniture,

So I think[b] [b]gave consumers relatively inexpensive houses and furniture [b] [/b][/b][/b]
should modify the farmland, so in B use
which gave consumers relatively inexpensive houses and furniture
is better.

2nd Question on "it"

in D,

The systematic clearing of forests in the United States created farmland (especially in the Northeast) and gave consumers relatively inexpensive houses and furniture, but it also

it can refer to The systematic clearing of forests ,
but the nearest Noun is houses and furniture, so it can also refer to houses and furniture?

Thanks in advance.

[JonathanSchneider]

answered in a separate post : )