A nurse is collecting data from an infant at a well-child visit. The nurse should understand that birth weight typically doubles by what age?

Rationale: A. By 12 months, an infant’s birth weight typically triples, not doubles. B. By about 5 to 6 months of age, an infant’s birth weight should double. C. At 3 months, infants have not yet doubled their birth weight; they are still gaining steadily. D. By 9 months, the infant’s weight is more than doubled but not yet tripled.