Final answer:
ITP is an autoimmune disorder characterized by a low platelet count.
Step-by-step explanation:
The correct statement regarding idiopathic thrombocytopenic purpura (ITP) is C) It is an autoimmune disorder.
ITP is a disorder characterized by a low platelet count due to the destruction of platelets by the immune system. It is not caused by a genetic mutation (A), and it does not result in an excess of platelets (B). Additionally, ITP primarily affects the blood and not the liver (D).