The correct answer is an infant typically b. triples his or her birth weight.
With a regular diet, following the The American Academy of Pediatrics recommendation, that infants be exclusively breastfed for the first six months of life. After introducing solid foods, babies should continue to breastfeed for a year, or as long as is mutually desirable by the mother and baby. The regular weight expectation is for the baby to triple his or her birth weight by about age 1 year, and also grow about 1 centimeter per month.