Final answer:
The typical height for a 12-month-old is approximately 29.5 inches, making the best answer choice c. 30 inches.
Step-by-step explanation:
The typical height for a 12-month-old is approximately 29.5 inches. As reported by the WHO Multicentre Growth Reference Study Group, an average newborn measures about 19.5 inches at birth and reaches around 29.5 inches by 12 months. Therefore, the correct answer is c. 30 inches. This period of infancy represents a stage of rapid physical development where an infant almost doubles their birth length by their first birthday.
The typical height for a 12-month-old is around 29.5 inches according to the World Health Organization (WHO) Multicentre Growth Reference Study Group. During the first year, infants typically grow about 2.5 cm (1.0 in.) per month. By the end of the first year, an infant may nearly double its birth length.