Answer the following question given this paragraph: 

Unsaturated fatty acids have at least one double bond between carbon atoms. As a result, some carbon atoms are not bonded to as many hydrogen atoms as possible. They are unsaturated with hydrogens. Unsaturated fatty acids are found in oils.


Q: Where are unsaturated fatty acids commonly found?

 Choices:

- animal products

- butter

- fish

- oil

A:
oil
