Economists believe that there are more efficient ways to deal with pollution than with environmental standards because these standards do not : a. internalize the externality. b. allow reductions in pollution to be achieved at minimum cost. c. reduce pollution enough. d. provide for any means of enforcement.

B. allow reductions in pollution to be achieved at minimum cost.

Explanation:

Environmental standardization - development and establishment of a set of mandatory rules, requirements, norms and norms in the field of use of natural resources, protection of the environment from pollution and other harmful influences, ensuring ecological safety, aimed at improving their environmental characteristics and implementation of system-wide identification for establishment conformity and certification.The subject of standardization - technical legislation and regulatory documents regulating the processes, methods, methods, rules of human life. However, the economists think that  these standards are not enough and have some problems. Based on social and economical analyzes, they proved that these regulations can not control polluter's emissions directly and then there will be the appearance new methods which are more effective than these. The biggest problem with environmental standards is : these standards are not flexible and they do not allow to fulfill the reduction in pollution by achieving at minimal cost.

b, fewer problems later! good luck

the answer is account d