The Person Most at Risk for Vitamin D Deficiency Is

The person most at risk for vitamin D deficiency is a

A) 12-year-old girl who plays soccer at the local playground twice a week.
B) 28-year-old mother who breastfeeds her 5-month-old infant and takes a daily stroll in the neighborhood.
C) 62-year-old woman who lives in a cold climate and rarely goes outdoors.
D) 42-year-old man who plays golf once a week.