**asap** petroleum is a mixture consisting mostly a.) aromatic hydrocarbons b.) methane and long branches alkanes c.) methane, ethane, propane, and isomers of butane d.) long branched alkanes and alkenes

b.) methane and long branches alkanes

Explanation:

Petroleum or crude oil is a fossil fuel formed by the decomposition of organisms buried under the earth's surface and subjected to intense pressure and temperature. It is composed of a mixture of hydrocarbons which include paraffins (linear and branched alkanes), naphthenes (cyclic alkanes) and other aromatic compounds.

However, petroleum is predominantly consists of paraffins which have the general formula CnH2n+2 and include methane and other long branched alkanes.

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