A Pregnant Woman Visited an Antenatal Clinic $(10 \mathrm{~cm})$
-The Following Statements Concerning This Examination Are Correct Except

A pregnant woman visited an antenatal clinic. A vaginal examination revealed that the sacral promontory could be easily palpated and that the diagonal conjugate measured less than 4 in. $(10 \mathrm{~cm})$ .
-The following statements concerning this examination are correct except which?

A) Normally it is difficult or impossible to feel the sacral promontory by means of a vaginal examination.
B) The normal diagonal conjugate measures about 10 in. $(25 \mathrm{~cm})$ .
C) This patient's pelvis was flattened anteroposteriorly, and the sacral promontory projected too far forward.
D) It is likely that this patient would have an obstructed labor.
E) This patient was advised to have a cesarean section.