Which of the Following Is the Correct Technique to Check

Which of the following is the correct technique to check for crowning in the assessment of a woman in labor?

A) Ask the woman to "push" or "bear down" as you inspect the vaginal opening.
B) Place your hand on the woman's abdomen, just above the umbilicus, and check for the firmness of the uterus during contractions.
C) Cover her with a sheet, have her remove her underwear, wait for a contraction, and then visualize the vaginal opening.
D) None of the above