An Elderly Woman Was Run Over by an Automobile as She

An elderly woman was run over by an automobile as she was crossing the road. Radiographic examination of the pelvis in the emergency department of the local hospital revealed a fracture of the ilium and iliac crest on the left side.
-The following statements about fractures of the pelvis are correct except which?

A) Fractures of the ilium have little displacement.
B) Displacement is prevented by the presence of the iliacus and the gluteal muscles on the inner and outer surfaces of this bone, respectively.
C) If two fractures occur in the ring forming the true pelvis, the fracture will be unstable and displacement will occur.
D) Fractures of the true pelvis do not cause injury to the pelvic viscera.
E) The postvertebral and abdominal muscles are responsible for elevating the lateral part of the pelvis should two fractures occur.
F) A heavy fall on the greater trochanter of the femur may drive the head of the femur through the floor of the acetabulum and into the pelvic cavity.