A Heat Engine Would Have 100 Percent Efficiency If Its

Multiple Choice

A heat engine would have 100 percent efficiency if its input reservoir were

A) 100 times hotter than the exhaust sink.
B) 1000 times hotter than the exhaust sink.
C) 100 times cooler than the exhaust sink.
D) any finite temperature if the exhaust sink were at absolute zero.
E) at any finite temperature regardless of the heat sink temperature.