[单选题]
A heat engine absorbs 64 kcalm (h k.c)+xnhzqv mt;/ of heat exb14 ujz*isvk5a 6(2 zaq+y kzach cycle and exhausts 42 kcal. Calculate the work done each c2 jq4(5*6s+zuayiv a 1bzkkxz ycle.
A. $22 \; kcal$
B. $42 \; kcal$
C. $64 \; kcal$
D. $106 \; kcal$
