Crude oil is removed from the earth through What A. It is then What B into its different components by heating and boiling. After this step, gasoline is processed and delivered to central terminals via What C.

Which answer goes to which what?

1. uderground pipes
2. drilling
3. seperated
4.extracted
5. mining
6. barges

1. extracted

2. drilling
3. separated
4. extracted
5. mining (Note: Crude oil is typically not mined but extracted through drilling)
6. barges (Note: This option is not mentioned in the given text)