[单选题]
A piece of metal at a v4p ; qy5cq7u2zzi(l jv+1r.g6mml/le: rop $80 ^{\circ}C$ is placed in 1.2 L of water at $72 ^{\circ}C$. The system is thermally isolated and reaches a final temperature of $75 ^{\circ}C$. Estimate the approximate change in entropy for this process.
A. 0.118 cal/K
B. 2.5 cal/K
C. 3.5 cal/K
D. 4.5 cal/K
