Answer: d) Command-and-control policy.
Explanation:
Command and control policy is the policy through which environmental factors are managed and regulated through common usage factors of organizations and factories. They have ability to restrict use,permit use, providing certain standards etc for organization in terms of equipment, process,social cost etc .
According to the question, if government is limiting air pollution to 75 parts per million for the factory then command and control policy is implemented as they are restricting the operation to a certain air pollution.
Other options are incorrect because subsidy, market related policy and corrective tax are not the policy that will be not introduced through limiting air pollution caused by glue factory to certain parts per million. Thus, the correct option is option (d).
