The relevant factors in determining the morbidity of a group include age, race, and occupation. However, prior claims experience does not directly impact morbidity, making it the correct answer to this question. Therefore, the chosen option is D. prior claims experience .
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In determining the morbidity of a group, factors such as age, race, and occupation are significant, while prior claims experience is not. Morbidity focuses on health conditions rather than insurance claims history. Hence, prior claims experience does not directly affect the morbidity of individuals. ;