Answer :
The correct answer should be A. they are relatively cheap
They are expensive to extract and can even be expensive for anyone that is not from a developed country. They are widely available as anyone can pour gas bought from foreign countries in their cars, and they are easy to use and transport.
They are expensive to extract and can even be expensive for anyone that is not from a developed country. They are widely available as anyone can pour gas bought from foreign countries in their cars, and they are easy to use and transport.