C. Crude oil is found below natural gas reservoirs.
Crude oil is a unrefined form of petroleum. Natural gas and crude oil both are nonrenewable sources of energy that are formed by remains of plants and animals that died millions of years back.
Natural gas is lighter as compared to crude oil. So natural gas has lower density as compared to crude oil. Due to this, crude oil is found below the natural gas reservoirs.
Crude oil does not float over natural gas in the pore space of a reservoir rock. upon drilling of these energy sources, crude oil is much deeper than the natural gas. This means the answer to this problem would be C.
