The source of this question is Princeton Review - Crack the GMAT. I understand that "which" must be immediately preceded by the word it modifies (although prepositional phrases can be exceptions). Why isn't (A) the correct choice? Doesn’t "which" modify $167B? Additionally, which numerical idiom is appropriate with percentages: "14 percent higher" or "14 percent more than"?
Sales of United States manufactured goods to non-industrialized countries rose to $167 billion in 1992, which is 14 percent more than the previous year and largely offsets weak demand from Europe and Japan.
A) which is 14 percent more than the previous year
B) which is 14 percent higher than it was the previous year
C) 14 percent higher than the previous year's figure
D) an amount that is 14 percent more than the previous year was
E) an amount that is 14 percent higher than the previous year's figure