Question ID:PT42 S4 Q1 Passage:Many newborn babies have a yellowish tinge to their skin because their blood contains a high level of the pigment bilirubin. One group of doctors treats newborns to reduce high levels of bilirubin, since bilirubin, if it enters the brain, might cause the tetanus that sometimes occurs in newborns. However, a second group of doctors argues for allowing bilirubin levels in newborn babies to remain high, since the brain's own natural defenses normally prevent bilirubin from entering. Stem:Which one of the following, if true, most helps to support the position of the second group of doctors? Correct Answer Choice:DChoice A:The treatment that most effectively reduces high levels of bilirubin in newborns has no known negative side effects. Choice B:Some diseases that occur in newborns can weaken the brain's natural defenses and allow bilirubin to enter. Choice C:In newborns the pigment bilirubin, like other pigments, occurs not only in the blood but also in fluids involved in digestion. Choice D:Bilirubin neutralizes certain potentially damaging substances to which newborns are exposed at birth. Choice E:Among doctors who recommend treating newborns to reduce high levels of bilirubin, there is general agreement about what levels should be considered excessively high.