Which of the Following Is an Example of Human Sustainability

Which of the following is an example of human sustainability?

A) Glenneth & Co., a pharmaceutical company, recruits employees on a temporary basis.
B) Margaret works every day for eleven hours as a receptionist in a law firm.
C) Carmel Works, a software company, provides ample health insurance coverage for its employees as well as their dependents.
D) Preacher & Abel, a cosmetic company, cut down on the wages of its employees to reduce cost of production.
E) Brent Inc. takes the initiative of planting trees across the town in which it operates.