What Would Be the Best Way for a Parent to Apply

What would be the best way for a parent to apply the results of Clara Davis's research on infant food preferences to encourage healthy eating of their children?

A) Infants should be given the chance to choose from healthy and unhealthy foods.
B) Infants should be given the same food every day for at least a month.
C) Infants should be given access to multiple healthy foods every day and allowed to choose from those.
D) Once an infant has rejected a food item twice, the parent should not offer it again because the infant does not like that item.