Answer:
a. retrospective rating
Step-by-step explanation:
Retrospective Rating can be regarded as a rating plan which is able to give
adjustments to it's premium, this rating can be subjected to a certain minimum as well as maximum, the rating is able to reflect or state the current loss experience of the insured. This rating give combination of actual losses as well as graded expenses so that produce a premium that reflects the current experience of the insured accurately can be produced. It should be noted that retrospective rating is a rate-making method designed to adjust a premium to reflect the actual loss experience of an insured during the policy period