Environmental Regulations for Social Reasons Have Been Necessary Because of Which

Environmental regulations for social reasons have been necessary because of which of the following?

A) Most companies eagerly pay for the costs involved with protecting their environment because they realize their future is closely linked with the future of the environment.
B) Consumers have willingly footed the bill for the costs of protecting the environment through paying higher prices for products and services.
C) Companies have felt pressured to "voluntarily" pay for environmental protection acts because they are afraid of the impact on their businesses if they are not viewed as environmentally responsible organizations.
D) Social reasons have led to regulations such as environmental protection and preservation because, although most companies voluntarily take on these responsibilities, a few companies have shirked their share of the responsibility.
E) Social reasons have led to regulations such as environmental protection since most companies are unwilling to pay for these costs voluntarily.