Sentence Correction

In little more than a decade, Argentina has become the world's leading exporter of honey, with
nearly 90,000 tons a year sold to foreign markets, almost half of which going to the United States.
A. with nearly 90,000 tons a year sold to foreign markets, almost half of which going
B. with the sale of nearly 90,000 tons a year to foreign markets, and almost half of it that goes
C. with the sale to foreign markets of nearly 90,000 tons a year, with almost half of it going
D. selling nearly 90,000 tons a year to foreign markets, and almost half of it goes
E. selling nearly 90,000 tons a year to foreign markets, with almost half going

I was stuck between option D and E and then chose E over D because of pronoun 'it' in option D.
Can someone please clarify if 'it' in option D refers to
1. Argentina or honey.
2. Or does 'it' refer to only 'Argentina'
3.or 'it' has no referent in the sentence

Thanks
gmatrant