[单选题]
A machine part consists of 0.10 kg of iron and bs1 (2t2 lvkgn0.16rscon;f0 k 52v kg of copper. How much heat is added to the gear if thn2s;ofk v0 5cre temperature increases by $35 \; ^{\circ}C$?
A. $9.1 \times 10^{2} \; J$
B. $3.8 \times 10^{3} \; J$
C. $4.0 \times 10^{3} \; J$
D. $4.4 \times 10^{3} \; J$
