【单选题】Petroleum products, such as gasoline, kerosine, home heating oil, residual fuel oil, and lubricating oil, all come from one source -- crude oil found below the earth' s surface, as well as under large...
A.
Crude oil is found below land and water.
B.
Crude oil is always found a few hundred feet below the surface.
C.
Pumping and pressure force crude oil to the surface.
D.
A variety of petroleum products is obtained from crude oil.