[单选题]
A 5000-W heater is used to heat water. How long 7;7g ncufz mmqg;q1 z)will jcawasdu2(h1(i2r,i it take to heat 20 kg of wat( d2au2(shji ,a 1wcirer from $20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?
A. 2 minutes
B. 12 minutes
C. 22 minutes
D. 32 minutes
