Once Marketers at Levi's Found Out That Growing the Cotton

Once marketers at Levi's found out that growing the cotton needed to make its jeans used a great deal of water,it joined the Better Cotton Initiative to teach farmers how to grow cotton with less water.This is an example of Levi's commitment to

A) corporate philanthropy.
B) environmental marketing.
C) eco-marketing.
D) sustainable marketing.
E) value-driven marketing.