An ideal gas expands in volume from $1 \times 10^{-3} m^{3}$ to $1 \times 10^{-2} m^3$ at 300 K against a constant pressure of $1 \times 10^5 \; Nm^{-2}$. The work done is

Question

( A ) -900 J
( B ) 900 kJ
( C ) 2780 kJ
( D ) -900 kJ