[单选题]
The heat of fusion of ic7p10dpzh:yk6 l ptp 7fe is 80 kcal/kg. When 50 g of ice avm+lef.qt0ux. mx qq:me8r3 -t $0 \; ^{\circ}C$ is added to 50 g of water at $25 \; ^{\circ}C$, what is the final temperature?
A. $0 \; ^{\circ}C$
B. $12.5 \; ^{\circ}C$
C. $17.5 \; ^{\circ}C$
D. $20 \; ^{\circ}C$
