[单选题]
A container of ideal gas at STP undergg5ytm l0w72q yoesstm:7en e,5y fpyegz 4g6p*w+ an isothermal expansion and its entropy chanpy6tgye4np:w*s z,f 7eeg5m+ ges by 3.7 J/e K. How much work does it do?
A. zero
B. $1.0 \times 10^{3} \; J/K$
C. $-1.0 \times 10^{3} \; J/K$
D. none of the above
