Final answer:
The two types of experience-rated approaches are individual and group-based. These approaches adjust premiums based on the claims history of an individual or a group, respectively.
Step-by-step explanation:
The two types of experience-rated approaches related to Employment Insurance (EI) are D. Individual and group-based approaches. Experience-rated systems are designed to set insurance premiums according to the claim history of an individual or group. For an individual approach, the rate of EI premiums paid by an employer may vary depending upon the employee's history of claims. In a group-based approach, the rate is determined by the collective experience of a group, for example, all employees within a specific firm or industry sector.