[单选题]
A container of ideal vvhe6;jm hnc7b6 5uf2gas at STP undergoes an i :g afba5mgl5;sothermal expansion and its entropy lg;a5mf gb:a 5changes 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
