A Heat Engine Absorbs Energy of Magnitude $\mid$ Q_H $\mid$ From a High Temperature Reservoir, Does Work of Magnitude

Multiple Choice

A heat engine absorbs energy of magnitude $\mid$ Q_H $\mid$ from a high temperature reservoir, does work of magnitude $\mid$ W $\mid$ , and transferes energy of magnitude $\mid$ Q_L $\mid$ as heat to a low temperature reservoir. Its efficiency is:

A) $\mid$ Q_H $\mid$ / $\mid$ W $\mid$
B) $\mid$ Q_L $\mid$ / $\mid$ W $\mid$
C) $\mid$ Q_H $\mid$ / $\mid$ Q_L $\mid$
D) $\mid$ W $\mid$ / $\mid$ Q_H $\mid$
E) $\mid$ W $\mid$ / $\mid$ Q_L $\mid$