Problem: A 7-year-old previously healthy child suddenly develops widespread bruising and a petechial rash. The child had a mild viral illness two weeks ago. Blood tests show a platelet count of only 15,000, with no other abnormalities in the complete blood count. Which condition is most likely responsible for these findings? Group of answer choices Acute immune thrombocytopenic purpura (ITP) Thrombotic thrombocytopenic purpura (TTP) Von Willebrand Disease Hemophilia A