A Carnot refrigerator runs between a cold reservoir at temperature TL and a hot reservoir at temperature TH. You want to increase its coefficient of performance. Of the following, which change results in the greatest increase in the coefficient? The value of AT is the same for all changes. O Raise the temperature of the hot reservoir by AT O Raise the temperature of the cold reservoir by AT O Lower the temperature of the hot reservoir by AT Lower the temperature of the cold reservoir by AT O Lower the temperature of the hot reservoir by (1/2)AT and raise the temperature of the cold reservoir by (1/2)AT Save for Later Attempts: 0 of 1 used Submit