Power generation using the Ocean Thermal Energy Conversion method ) uses the temperature difference between shallow and deep ocean water to run turbines that generate electricity uses the temperature difference between daytime and nighttime in tropical oceans to generate electricity uses the energy of tsunami generated in polar regions and moving toward tropical regions to generate electricity converts the heat from black smokers on the sea floor into useable energy

uses the temperature difference between shallow and deep ocean water to run turbines that generate electricity.

Explanation: Ocean thermal energy conversion (OTEC). Makes use of the ocean thermal rise between cooler deep part of the ocean and warmer shallow surface seawaters or oceans to power heat engines ( usual a turbine) which produces useful work, which is usually in the form of electricity. ocean thermal energy conversion ( OTE ) has the properties to operate at a very high capacity factor which is same as it ability to operate at a lower base mode too.

the awnser is a

it is not b or c