The answer is B. Providing condenser cooling water is not a primary goal of subsystems associated with vapor power plants. The primary goals of these subsystems are to convert thermal energy from the combustion of fuel into mechanical energy, which is then converted into electrical energy through a generator.

Organic Rankine Cycle is a technology that convert low-temperature heat sources into a mechanical energy, and it can be used to produce electrical energy in a closed system. The heat sources can be received from renewable energy such as geothermal, solar, and biomass.