Gasoline is a mixture of many different hydrocarbons, including alkanes with four to twelve carbon atoms. Rank the following linear alkanes from least to greatest number of carbon atoms.

a) Butane, hexane, octane, dodecane
b) Hexane, octane, butane, dodecane
c) Butane, octane, hexane, dodecane
d) Octane, hexane, butane, dodecane