[单选题]
A 5000-W heater is use+l ;j r pkran0yu22,7c 6cuarf,d5xcz 7yhzxrn -0/li b. rxz1d to heat water. How long will it take to heat 20 kg of watb7rzlx1yhn0.ri - z /xer from $20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?
A. 2 minutes
B. 12 minutes
C. 22 minutes
D. 32 minutes
