Most doctors recommend that pregnant women eat a nutritious diet to promote the health of their babies. However, most babies who are born to women who ate nutritious diets while pregnant still develop at least one medical problem in their first year. Which one of the following, if true, does most to resolve the apparent discrepancy in the information above? ['Women who regularly eat a nutritious diet while pregnant tend to eat a nutritious diet while breast-feeding.', 'Many of the physicians who initially recommended that pregnant women consume nutritious diets have only recently reaffirmed their recommendation.', 'Babies of women who did not eat nutritious diets while pregnant tend to have more medical problems in their first year than do other babies.', 'Medical problems that develop in the first year of life tend to be more serious than those that develop later in childhood.']