The correct option is C Coast guards
Oil spills occur when liquid petroleum is released into the environment by vehicle, vessel or pipeline. It is mostly seen in water bodies. In water bodies, improper oil extraction due to drilling rigs, offshore oil platforms and well result in oil spills. Oil spill prevention and clean up procedures include the use of dispersants to break down the oil, collect oil from the surface of the water using a skimmer or use of biological agents. These procedures are monitored by coast guards. Thus, the correct answer is option C.