The answer is A.
Exercising excessively is highly discouraged by doctors. This is because it might cause too much stress on the fetus carried by the mother. Women who are pregnant may engage in exercise under moderation and should be under the guidance of a professional. Doctors usually suggest exercises that are safe for both the mother and the baby. Studies have shown that exercise contributes to making delivery an easier task because the muscles of the hip bones are already relaxed.