[单选题]
A refrigerator removes hcx h) j6;nwx46)vqnghex pqf 4jq9u;/vat from the freezing compartment at the rate of 20 kJ and ejects 24 kq jfxu ;94/pqvJ into a room per cycle. How much work is required in each cycle?
A. $4 \; kJ$
B. $20 \; kJ$
C. $24 \; kJ$
D. $44 \; kJ$
