| Green food is a general term for food produced in a good ecological environment that is pollution-free, safe and of high quality. Green food is divided into two categories: Grade A and Grade AA: Grade A green food in the production process is allowed to use a limited number of limited chemical synthetic substances; Grade AA green food in the production process is not allowed to use any harmful chemical synthetic substances. Therefore, Option D is in line with the meaning of the question. Select: D. |