Final answer:
The correct answer with regard to the rule of nines for an infant is head-18%, which accounts for the larger proportion of an infant's head in comparison to the rest of the body.
Step-by-step explanation:
The correct answer with regard to the rule of nines for an infant is C. head-18%.
The rule of nines is used to estimate the percentage of body surface area that has been burned in order to guide treatment decisions.
For adults, the body is divided into sections that represent 9% of the body's surface area, but for infants and children, these percentages are adjusted due to different body proportions, specifically the head, which is proportionally larger in infants than in adults.
Therefore, in an infant, the head accounts for approximately 18% of the body's surface area.