Tim Smith,aged 16 Years,was Hit by a Car While Riding

Tim Smith,aged 16 years,was hit by a car while riding his motorcycle.At the hospital he showed only minor abrasions and no bone fractures.He was discharged later that day.In the morning he experienced severe abdominal pain and returned to the hospital.Examination revealed tachycardia,low blood pressure,and a weak pulse.He received a blood transfusion without improvement.Laparoscopic surgery confirmed peritoneal hemorrhage due to a ruptured spleen.In addition to a splenectomy,which of the following treatments would be administered?

A) plasmapheresis to remove autoantibodies (antibodies generated against self constituents)
B) regular intravenous injections of gamma globulin
C) vaccination and regular boosters with capsular polysaccharides from pathogenic pneumococcal strains
D) booster immunization with DTP (diphtheria toxoid,killed Bordetella pertussis,and tetanus toxoid)
E) regular blood transfusions