The correct answer is:
(Choice C) Water is polar and oil is nonpolar.
Water is a polar molecule, which means it has a positive and a negative end due to the difference in electronegativity between hydrogen and oxygen atoms. Oil, on the other hand, is nonpolar, meaning it does not have a significant charge difference throughout the molecule. Polar and nonpolar substances typically do not mix well, leading to the inability of water to dissolve oil.