[单选题]
If 40 kcal of heat is addu/upi h*lrm8*e+bb4xxca hvs5 5.dtu:0fb* w ed to 2.0 kg of water, what is the resulting temperature chan0*:swxb+v4c.bdhaufx5 bt 5 e ge?
A. $80 \; ^{\circ}C$
B. $40 \; ^{\circ}C$
C. $20 \; ^{\circ}C$
D. $0.05 \; ^{\circ}C$
