Margarine is made by hydrogenating vegetable oils so that they take on the consistency of butter. Which of the following is the chemical basis for this change from a liquid to a solid?
A. Fats are changed from unsaturated to saturated, allowing them to solidify.
B. Fats are changed from saturated to unsaturated, allowing them to solidify.
C. Trans-fatty acids are changed from unsaturated to saturated, allowing them to solidify.
D. Trans fatty acids are changed from saturated to unsaturated, allowing them to solidify.
Answer: A