A Carnot refrigerater runs between a cold reservoir at temperature TC 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 T is the same for all changes.
A) Raise the temperature of the hot reservoir by T
B) Raise the temperature of the cold reservoir by T
C) Lower the temperature of the hot reservoir by T
D) Lower the temperature of the cold reservoir by T
E) Lower the temperature of the hot reservoir by (1/2) T and raise the temperature of the cold reservoir by (1/2) T
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