How does the angle of the pelvic arches differ in male and female pelvises?

• A. The angle of the male pelvic arch tends to be more acute than the female pelvic arch.
• B. A female's pelvic arch tends to be rounder to accommodate the head of the baby.
• C. The female pelvic arch tends to be more heart shaped than the male pelvic arch.
• D. The pelvic arch is not a reliable indicator of sex.