A Certain Heat Engine Extracts $1.30 \mathrm {~kJ}$ Of Heat from a Hot Temperature Reservoir and Discharges

Multiple Choice

A certain heat engine extracts $1.30 \mathrm {~kJ}$ of heat from a hot temperature reservoir and discharges $0.70$ $\mathrm { kJ }$ of heat to a cold temperature reservoir. What is the efficiency of this engine?

A) $13 \%$
B) $27 \%$
C) $54 \%$
D) $86 \%$
E) $46 \%$