According to the Textbook, Which of the Following Is a NOT

According to the textbook, which of the following is a NOT a common operations performance measure for the ethics/sustainability performance category?

A) Percent reduction in greenhouse gas emissions (carbon footprint)
B) Percent of purchases from small, minority-owned, or women-owned suppliers
C) Customer satisfaction score
D) Percent of waste recycled
E) Number of fair trade products purchased