Which factor is important to include in the teaching plan for parents of a child with Legg-Calve-Perthes disease?

The correct answer is B: There is a disturbance in the blood supply to the femoral epiphysis. Legg-Calve-Perthes disease is a condition where there is a disruption in blood flow to the femoral head, leading to avascular necrosis. Teaching parents about this factor is crucial as it helps them understand the underlying cause and potential complications. Choice A is incorrect as Legg-Calve-Perthes disease is a chronic condition lasting much longer than 1 to 2 weeks. Choice C is incorrect as the disease is not caused by a virus but by the blood supply issue. Choice D is incorrect as Legg-Calve-Perthes disease primarily affects children, not adults.