A Research Assistant Helping Out with a Study of 3-Month-Old

A research assistant helping out with a study of 3-month-old infants notices that a particular infant responds much more slowly in the laboratory procedure than other infants she has seen in a month of working on the study. According to research ethics guidelines, the research assistant should

A) stop the session and let the parent know that the infant might be developmentally delayed
B) give the parent detailed, specific information about the infant's performance compared to other infants, hoping that the parent will seek help from the infant's pediatrician
C) discuss the infant's performance with the principal researcher but say nothing to the parent because the laboratory procedure is not a recognized developmental assessment and the research assistant lacks expertise in infant assessment
D) notify child protection authorities immediately