Answer: Yes, because the presumption at issue operates upon elements of the prima facie case.
Step-by-step explanation:
Based on the scenario illustrated in the question, the court should apply the presumption. It should be noted the federal court should be able to apply the state law where the court sits in a case that relates to the diversity of the citizenship under the Erie doctrine.
In this case, the court should apply the presumption in question because the presumption at issue operates upon elements of the prima facie case. It should be noted that the matters that has to do with prima facie case are substantive therefore state law should be applied to such scenarios.