A Steam Power Plant with an Efficiency of 65% of the Maximum

A steam power plant with an efficiency of 65% of the maximum thermodynamic efficiency operates between 250^oC and 40^oC. How much heat is rejected to the cold reservoir in doing 1.0 kJ of work?

A) 3.8 kJ
B) 0.83 kJ
C) 2.8 kJ
D) 1.8 kJ
E) 0.67 kJ