In some US hospitals, male infants are wrapped in blue blankets when they are born, whereas female newborns are bundled in pink blankets. This is because

A) Gender differences are biological
B) Humans all share in a universal system of color symbolism
C) those hospitals participate in cultures that construct these colors as gendered in this way
D) it is crucial to human health to know if a baby is male or female
E) No answer here is correct