<prompt> Which of the following would best explain a prolonged bleeding time test?Hemophilia AHemophilia BThrombocytopeniaCoumadin use  <response>: Three major tests are used to determine coagulation defects. PTProthrombin time- is used to test the extrinsic pathway aPTTActivated Paial Thromboplastin Time-is used to test the intrinsic pathway BTBleeding time- after a small cut is used to test for several clotting factors but is especially prolonged by a lack of platelets Thrombocytopenia. 