Use the following information to answer the next question.
| In a particular state, 4 L of crude oil costs $3.20; 7 L of gasoline costs $6.65; 11 L of liquefied petroleum gas (LPG) costs $8.25; and 8 L of diesel costs $7.20. |
Among the four fuels, the costliest fuel is
crude oil
gasoline
liquefied petroleum gas
diesel