Final answer:
The likely derangement indicated by the decreased Von Willebrand factor activity is von Willebrand disease.
Step-by-step explanation:
The likely derangement indicated by the decreased Von Willebrand factor activity in this case is
c) von Willebrand disease
. Von Willebrand disease is a genetic disorder characterized by a deficiency or abnormality of von Willebrand factor, a protein involved in blood clotting. Symptoms of von Willebrand disease can include frequent nosebleeds, heavy menstrual flow, and anemia. The decreased Von Willebrand factor activity in the 29-year-old Inuit female suggests that she may have von Willebrand disease as a cause of her nosebleeds and anemia.