60% of the U. S. wind farms that have been built are located on a narrow wind corridor that extends from Texas to the Great Lakes, and research shows that most of the areas with the most significant decline in wind power in the United States coincide with this corridor As a result, the output of wind power in the United States has decreased significantly from the previous year. For the above reasoning to be true, Which of the following? ['The output of wind power stations located in this corridor is generally higher than that of wind power stations in other parts of the United States.', 'Wind power is the main body of electricity output in the United States, followed by hydropower and thermal power.', 'The output power of a wind turbine changes significantly with changes in wind power.', 'The vast majority of wind power plants under construction or planned in the United States are also concentrated in this corridor.']