Concept:The Rhesus factor is a blood group antigen first identified through specific scientific research.Explanation:The Rhesus factor was discovered by Karl Landsteiner and Alexander S. Wiener together with Philip Levine.Among the given pairs, Landsteiner and Lavine are the scientists associated with this discovery.The other pairs are not linked to the Rhesus factor discovery.Answer:C. Landsteiner and Lavine