Concept:Bile does not chemically digest fats; it emulsifies fats and oils into tiny droplets so digestive enzymes can act on them.Explanation:When the bile duct is obstructed, bile cannot reach the small intestine.Without bile, fats and oils are not emulsified.This makes their digestion and absorption very difficult.A person with this problem is therefore advised to avoid fats and oils.This is directly related to the fact that bile emulsifies fats and oils.Answer:C. bile emulsifies fat and oil