As a result of the "fast fashion trend, global clothing production has
a declined significantly since 2010.
b tripled since 2000.
e shifted back to the U. S.
d none of the above

b. tripled since 2000.

Explanation:

The question above is related to the article entitled "The Real Cost of Cheap Fashion."

Joining the fashion trend is now easier and cheaper because many of the fashion companies like H&M and Zara have made the idea of "cheap fashion" very popular. This means, it is easier for people to buy trendy clothes at a cheaper price when compared to designer's price. This resulted to other clothing companies following them and producing cheap fashion as well. The global clothing production then tripled since 2000 in order to address the increasing clothing demands.