A refrigerator consumes 400 J of mechanical energy in one cycle. In one cycle the refrigerator expels 500 J of heat energy into the high-temperature reservoir. In one cycle the amount of that energy the refrigerator absorbs from the low-temperature reservoir is
(a) 500 J
(b) 200 J
(c) 100 J
(d) 1300 J
(e) 1000 J
(f) 900 J
(g) none of the above answers
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