One way to covert an oil into a substance that is solid at room temperature is to
A. add hydrogens, decreasing the number of double bonds in the molecules
B. remove water, causing a dehydration synthesis reaction to occur
C. remove hydrogens, increasing the number of double bonds
D. put it in the refrigerator: when unsaturated fats cool, double bonds form and the fats solidify
E. add water and shake vigorously