[单选题]
A 200-L electric water heater uses 2 kdsmowo rz 6jt1a;f 09q75y m4hW. Assuming no heat loss,gl4*2 no(zbas how long would it take to hea4* gzolna(2bst water in this tank from $23 \; ^{\circ}C$ to $75 \; ^{\circ}C$?
A. $5 \; hours$
B. $6 \; hours$
C. $7 \; hours$
D. $8 \; hours$
