Answer:
d. a subpoena duces tecum
Explanation:
In this situation Exgrow Inc violated the Clean Air Act. which is a federal law that was created in order to regulate air pollution on a national level. In order to force Exgrow to give up the computerized reports concerning their pollution the EPA should use a subpoena duces tecum. This is court summons forcing the party in question to appear before the court and provide all the documentation or physical proof regarding the situation at hand. If they do not then they can either get fined or be shut down entirely.