Studies About the Effects of Pain-Relieving Drugs on the Health

Studies about the effects of pain-relieving drugs on the health of the newborn baby have shown

A) consistent results that such pain-relieving drugs have serious long-term consequences.
B) mixed results depending upon the drugs given and the amount administered.
C) that the drugs have no significant short- or long-term effect on the newborn.
D) uncertain results because it cannot be determined when the newborn's deficits are due to the drugs or genetics.