A nurse is measuring an infant's head circumference and height. Which area is the nurse assessing?

A. Head circumference and height reflect physical growth and organ development, which are part of biophysical development. B. Psychosocial development involves emotional, social, and personality development (e.g., Erikson stages). C. Cognitive development relates to learning, problem-solving, and memory (e.g., Piaget stages). D. Moral development refers to understanding right and wrong (e.g., Kohlberg theory), and does not involve physical measurements.