[单选题]
How much heat energy is ne6x5 cb:ruzl1l 7ua)dl eded to change 10c2*sizg;aq8c0 vn 1jw kg of water at $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?
A. $4.2 \times 10^{5} \; J$
B. $2.3 \times 10^{7} \; J$
C. $4.2 \times 10^{6} \; J$
D. $2.5 \times 10^{7} \; J$
