[单选题]
A container of ideal gas aw- z 53zq5aboyt STP unnvtml8 1jgs5e3y6/h ct;kwu2dergoes an isothermal expansion and its entrop 6/gl chwktsemtn3j2y1vu8; 5y changes 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
