Answer:
Option A, Offshore Drilling
Explanation:
In the process of offshore drilling, oil is extracted from the wells which are located at the surface of ocean floor.
Different types of oil rigs are used for oil extraction depending on the depth of the ocean.
It is a good mode of extracting oil from sources that have remained untapped since long. With the new technology, several nations have been able to explore this oil reserve and have become independent in terms of energy
Hence, option A is correct
