A nurse is collecting data from a 6-month-old infant in the well child clinic.Which of the following findings should the nurse expect?

Choice A rationaleThe infant's birth weight typically doubles by 4-6 months and triples by 1 year of age. If an infant's weight has tripled at 6 months, it may indicate overnutrition or an underlying health condition.Choice B rationaleLateral incisors usually appear between 9 to 13 months. At 6 months, the central incisors are more likely to be emerging.Choice C rationaleThe posterior fontanel typically closes by 2 to 3 months of age. Therefore, by 6 months, it is expected to be closed.Choice D rationaleInfants usually sit without support around 8 months. At 6 months, they may sit with support or briefly without support but not consistently.