Where do oil trains drop their cargo? construction sites, for use with heavy equipment

gasoline stations, where it is sold to the public

airports, for transfer to cargo planes

refineries, where the crude is processed into gasoline and other fuels

refineries, where the crude is processed into gasoline and other fuels

Explanation:

Before oil can be used, it needs to be processed into various fuels such as gasoline and airplane fuel. This is done in refineries that extract these fuels by using boiling point technology.

Oil trains transport oil to these refineries for the processing to be done. Options A and B are ruled out because oil needs to be processed first and option C is rued out because oil is not normally transported by air because it is expensive and dangerous.