<prompt> Diffuse peritonitis in acute appendicitis is caused due toEarly rupture of appendixLate rupture of appendixFecolithOld age  <response>: Diffuse peritonitis can develop rapidly because of the underdeveloped greater omentum, which is unable to give much assistance in localising the infection. Ref: Bailey Love;s Sho Practice of Surgery,E25,Page-1209 